Sensory Rainbow Blocks

Sustainability feature

Sustainability features

This product has sustainability features recognized by trusted certifications.

Forestry practices

Made with materials from well-managed forests, recycled materials, and/or other controlled wood sources.

As certified by

FSC Certified & CPC Safety Verified
FSC Certified & CPC Safety Verified
Age: 3-6 Years
Regular price $79.99 USD
Sale price $79.99 USD Regular price $79.99 USD
Save $0.00 Sold out
Shipping calculated at checkout.

SKU: ALTY1182

Description

Discover the magic of hands-on sensory play with the Hicooo Sensory Rainbow Blocks — a beautifully crafted 22-piece Montessori sensory building block set that captivates young minds through sight, sound, and touch all at once. Each natural beech wood block features a clear acrylic window revealing one of three mesmerizing fillings — flowing colored sand, swirling colored water, or rattling colorful plastic beads — turning every stack, shake, and tumble into a rich multi-sensory discovery moment.

Featuring five distinct shapes across 22 pieces — 9 small squares, 3 large squares, 5 rectangles, 3 semicircles, and 2 triangles — this Sensory Rainbow Blocks set gives toddlers and preschoolers an endless variety of building combinations to explore. Watch as little ones shake a bead-filled triangle to hear it rattle, tilt a sand block to watch the colors cascade, or hold a water block up to the light to see colors dance and swirl. Every interaction is a new sensory experience that keeps children engaged, focused, and learning.

Designed for children aged 2 and above, this open-ended STEM learning toy supports natural Montessori-style exploration of shape, color, weight, and material properties — all through screen-free, imaginative, hands-on play. Whether building towering castles, sorting by shape, or simply shaking and observing, children develop fine motor skills, spatial reasoning, color recognition, and cause-and-effect understanding at their own pace. A stunning birthday, Christmas, or Easter gift for toddler boys and girls that parents and educators alike will love.

Features
  • 22-Piece Sensory Rainbow Blocks Set — Includes 9 small squares, 3 large squares, 5 rectangles, 3 semicircles, and 2 triangles; five shape varieties deliver diverse building, sorting, and stacking possibilities while naturally introducing shape recognition, color vocabulary, and early geometry through open-ended Montessori play for toddlers ages 2 and up
  • 3 Captivating Sensory Fillings — Sight, Sound & Movement — Every block contains one of three dynamic materials visible through a clear acrylic window: flowing colored sand, swirling colored water, or rattling colorful plastic beads; shaking, tilting, and swirling each block creates a unique visual and auditory sensory response that stimulates multiple areas of developing brains simultaneously
  • Montessori Open-Ended Building & Creative Play — No rules, no instructions; children freely stack, sort, arrange, and build whatever their imagination creates; stacking blocks of varying sizes and weights develops spatial awareness, cause-and-effect understanding, sequencing, and independent problem-solving from the very first play session
  • Fine Motor Skills & Hand-Eye Coordination Development — Reaching, grasping, lifting, and balancing blocks of different shapes and weights strengthens grip, bilateral coordination, and dexterity in toddlers and preschoolers; every build session is quietly delivering real developmental value through active hands-on play
  • Premium Beech Wood, Non-Toxic & Child-Safe — Solid natural beech wood frames with sealed BPA-free acrylic windows; smooth splinter-free surfaces with rounded edges and child-safe finishes; all filling materials safely contained inside; durable enough for years of enthusiastic play and a perfect gift for boys and girls at birthdays, Christmas, Easter, and Children's Day
Specifications
  • Product Name: Hicooo Sensory Rainbow Blocks
  • Age Recommendation: 2 Years and above
  • Total Pieces: 22 pieces
  • Piece Breakdown:
    Small squares: 9 pieces
    Large squares: 3 pieces
    Rectangles: 5 pieces
    Semicircles: 3 pieces
    Triangles: 2 pieces
  • Frame Material: Premium natural beech wood, smooth rounded edges, child-safe finish
  • Window Material: Clear sealed acrylic panel
  • Developmental Benefits: Fine motor skills, hand-eye coordination, color recognition, shape recognition, spatial awareness, cause-and-effect, sensory development, creative thinking
  • Safety: Non-toxic, BPA-free, splinter-free, sealed acrylic — all filling materials safely contained
  • Safety Warning: Adult supervision recommended; not suitable for children under 2 year

See Skills

  • Real-Life Connection
  • Healthy Eating Awareness
  • Fine Motor Skill
Safe Payment
Free Express Shipping*
Delivery 7-10 Weekdays



More payment options

  • 5 stars: 21 (78%)
  • 4 stars: 6 (22%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
J
James Taylor
Keeps them occupied

Good quality stuff. The blocks are a nice size for little hands, and my grandkids love making patterns with them. The only thing is they slide a little bit if you try to build too high, but other than that, they're great.

A
Ashley Anderson
Super durable

My toddler is not gentle with toys, and these have held up perfectly. They feel really solid and I love the combination of the natural wood and the colors inside. They are a great way to keep him busy and focused.

R
Robert Martinez
Mesmerizing to watch

Even I find myself playing with these sometimes! They are so soothing to watch. The materials feel premium and safe for my toddler. Definitely one of the better toy investments we've made lately.

E
Emily Davis
Best purchase for quiet time!

These have become a staple during quiet time in our house. They are so calming to look at. I love that they are made from real wood, they feel solid and durable. They are perfect for imaginative building.

S
Sarah Jenkins
Absolutely stunning quality

These are honestly so beautiful to look at. The wood feels smooth and high-quality, and my daughter is obsessed with watching the colors move inside. They’ve kept her entertained for ages, which is a total win for me. Highly recommend for any playroom!

O
Oliver Henderson
So many pieces

Dumped the whole set out on the table and you really get a lot for your money. 22 pieces is plenty for two kids to share without fighting. Seeing all the different shapes and colors mixed together just invites them to start building and sorting.

J
Jessica & Tom
The bead blocks sound like little maracas!

Snapped a picture of these on our carpet. The blocks with the little blue and red plastic beads inside are a huge hit. They make a really satisfying rattle sound when you shake them. Visually and auditorily engaging!

V
Vanessa Long
Easy to pack away

Kept the original box because it’s actually great for storage. My kids love pulling the tray out onto the floor to pick their pieces. The colors are very vivid against the natural wood. Glad we purchased this 22-piece set.

B
Brandon White
They stack surprisingly well!

I wasn't sure how well blocks with acrylic centers would stack, but the wooden frames are perfectly flush. We built this little structure on our counter. The blue beads and green sand blocks balance perfectly on top of each other. Great for spatial awareness.

A
Alicia Guzman
Calming sensory toy for quiet time

We were playing with these on our textured rug this morning. Watching the green and yellow sand slowly fall through the clear windows is incredibly soothing. It’s the perfect toy for winding down before nap time.

S
Sophie Turner
Couldn't even wait to get them all out!

My kids were so excited when we opened this on their play mat. The blue bead square and the blue liquid one instantly caught their eyes. The plastic insert is actually quite handy for seeing exactly which shapes you are missing when cleaning up.

M
Megan Clark
Beautiful packaging, makes a perfect gift

I was impressed with how nicely these arrived. The box is very presentable, and the plastic tray keeps all the blocks secure during shipping. If you are looking for a nice Montessori gift for a 2 or 3-year-old, this presentation is 10/10.

K
Kevin O'Brien
Stunning contrast and great variety

They look absolutely beautiful scattered on our dark wood floor! I love that this set has a mix of everything—the yellow liquid half-circle and the green sand square are my toddler's current favorites.

L
Lauren Davis
Colored water is mesmerizing!

Took a close-up of these triangle blocks because the red liquid inside is just so vibrant. When you tilt them, the liquid moves slowly and catches the light beautifully. The wood is also sanded down perfectly smooth.

C
Christopher White
Great gift idea

I got these for my niece and she absolutely loves them. She’s been building things non-stop. They’re a little smaller than I initially pictured, but that actually makes them perfect for her small desk.

A
Amanda Clark
Beautifully crafted

You can tell these were made with care. They are smooth, solid, and the colors look amazing against the wood. My kid loves exploring how they look in different lighting. Very happy with this purchase.

S
Sarah Hudson
Stimulates creativity, wish there were extra shapes

The workmanship looks premium, and they stack together nicely. It’s wonderful to watch my child design houses and towers. I hope the set came with more arched and triangular pieces to expand building options.

C
Cole Bennett
Perfect combination of building and sensory fun

Most building blocks are plain, but these add such a lovely visual twist. My kid likes shaking the blocks to see the contents move. Great quality and easy for small hands to grab and arrange freely.

J
Justin Fisher
Fantastic open-ended building toy

The natural wood finish is smooth and sturdy, no sharp edges. My boy spends ages experimenting with different structures. The varied shapes offer tons of ways to create unique buildings every single play session.

E
Emily Sanders
So visually engaging for little kids

These wooden blocks are incredibly well crafted. The transparent panels with colorful filling catch my daughter’s eyes instantly. She loves stacking them to build tall castles and watching the materials shift inside each piece.

B
Brian Foster
Worth the price for endless play value

Sometimes wooden toys can be pricey, but this 22-piece set is worth it. It’s not a "play once and forget" toy. Between building, shaking, looking through the windows, and sorting, there are just endless ways to play. It really grows with the child.

C
Chloe Winters
Highly recommend for sensory development

My daughter is a sensory seeker and loves toys that provide auditory and visual feedback. Shaking these blocks gives her exactly what she needs. The wooden frames are very smooth, no splinters at all. It feels very safe and child-friendly.

M
Michael Patterson
The colored water blocks are a huge hit

Out of the three fillings, the swirling colored water ones are definitely the favorite in our house. They look like little magical potions. The construction is fully sealed; we've had them for weeks with heavy play and absolutely no leaks.

R
Rachel Baker
Beautiful but wish it came with a storage bag

The sensory blocks themselves are a solid 5/5. Visually stunning and very durable. I'm taking off one star just because it didn't come with a storage bag or a wooden tray to keep all 22 pieces neatly organized when not in use. Otherwise, a fantastic toy.

D
David Lawrence
Excellent STEM toy, no screens needed!

Love that this promotes cause-and-effect learning without any batteries, lights, or screens. My 3-year-old builds little castles and realizes that the heavier liquid blocks need to go on the bottom for stability. Really great hands-on geometry practice.

S
Sarah K.
A must-have for our Montessori shelf

We rotate toys frequently on our Montessori shelf, and this 22-piece set has been a permanent fixture for a month now. It’s perfect for open-ended play. The kids naturally sort them by shape or by what's inside (sand, water, or beads). Great for fine motor skills.

100% FSC® Certified Forests

Sustainable forests

CPC® certification

Childs Products Certificate

All-natural ingredients

No harmful substances

Growth · Confidence· Montessori

Subscribe to your parenting guide.

0-3 Months

Run

3 -6 Months

Run

6-9 Months

Run

12 -18 Months

Run

18 Months -3 Years

Run

3 -6 Years

Run