Children explore geometric and engineering builds while developing their fine motor, spatial thinking, and problem solving skills through open-ended quality block play. Sets of smooth-sanded rubberwood pieces encourage young builders to create buildings, bridges, and structures. Unit Blocks stimulate young minds with an incomparable experience of traditional block play while providing hours of continuous play. The blocks are sized based on the basic unit block measurement of 1.4" x 2.8" x 5.5" inches.

Little architects and engineers will learn through play as they build with ECR4Kids Wooden Hollow Block Set. These oversized unit-style hollow blocks introduce shape recognition and early math concepts like doubling, comparison, and symmetry. Students employ problem-solving and critical thinking skills as they stack and build with increasing complexity. Open-ended play supports imagination, and creativity, and helps develop independence as children design ramps, racetracks, and towers in countless arrangements. Use individually or pair up for teamwork, collaboration, and cooperative learning. Constructed from sustainably harvested birch plywood with a durable finish sealing the wood surface and resisting scratching. A UV inhibitor helps furniture resist ultraviolet light and yellowing. Natural birch plywood is extremely durable and will hold up to everyday use in daycares and preschools, great for the home. Hollow blocks are lightweight and easy to grasp for two-handed movement. This set of 18 hollow blocks includes two flat boards, one half-wide ramp, one ramp, six quarter units, two half-wide units, two units, and four square units.

Excellent quality and a good price. Michelle. ON. Fri Apr 17 2026

An adventure in color, light and sound! Indulge your child's appetite for exploration by combining blocks to form new colors and sounds, or stack the blocks in a different order each time to form new and exciting shapes. Smooth hardwood frames with primary colored acrylic windows. Sized to standard unit block measurements. Eight blocks per package: 4 rectangle and 4 half moon shapes. Features plexi inner with colored sand.Solid wood frames with inset colored acrylic windows and colorful sandSet includes 4 rectangles and 4 half moon shapesStrong hardwood framesTranslucent windows with colorful sandStandard unit block measurementsMaterial: Hardwood frames with primary colored, transparent plexi windows and colored sandEducational Focus: Hand-eye coordination, visual perception, color exploration or light table activitiesSuggested Age: 2+

Very nice toy well made the kids love to play with them in the classroom. Luann. US. Wed Mar 11 2026

Bring the instinctive wonder that children have for nature into the classroom with an organic, wooden building blocks set. The Wood Stackers River Stones invite children to build and stack using blocks inspired by the natural, polished shapes of river rocks. The rounded, wooden stones are sanded incredibly smooth to highlight the beautiful, natural grain and tones of the wood pieces. Different sizes help children understand weight, gravity and relationships. Inspiration cards encourage children to build creatively using the natural blocks to create familiar objects and encourage exploration in nature. For indoor/outdoor use. Store indoors in a cool, dry place out of direct sunlight. Set of 20. Ages 2+

Exactly as described. Great stacking tool. Joanna. Downey, CA. Thu Jun 22 2023

Set of 10 mirror blocks features hardwood frames with soft, rounded corners and Mylar mirrored double faced interiors. Sized to standard unit block measurements.Hardwood block set with mirrorsSet includes 10 blocksIdeal for indoor/outdoor STEM activitiesSmooth rounded corners and edgesStandard unit block measurementsMaterial: Rubberwood block frames with inset double-faced Mylar windowsEducational Focus: Science, visual perception, block play, size relationshipsWinner of the 2010 Oppenheim Toy Portfolio Platinum AwardSuggested Age: 2+

Good quality! The mirror has not scratched, with lots of towers being built.. Sandra. CA. Tue Mar 17 2026

An adventure in color and light! One-third smaller than unit block size, Jr. Rainbow Blocks are a new challenge in creating structures and extending traditional block play. Smooth hardwood frames with inset, colorful, transparent acrylic windows are also ideal for color exploration and light table activities .Solid wood frames with inset colored acrylic windows Set includes 20 assorted shapes Durable hardwood frames with vibrantly colored insets One third smaller than standard unit block measurements Material: Hardwood frames with primary colored, transparent acrylic windows Educational Focus: Hand-eye coordination, visual perception, color exploration or light table activities Winner of Oppenheim Toy Portfolio Gold Award Suggested Age: 2+

We love these! Our toddler uses them for open ended play, color sorting, and all kinds of things. They seem like really good quality that will last a long time. So glad we bought these!. Rebecca. Denver, CO. Mon May 18 2026