Hicooo® | Sensory Rainbow Blocks

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.

• 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

• 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