Compatible Building Blocks With Axle Hole 32123 - Replacement Parts' Brick Sets. Unleash Creativity and Innovation with the Technical Bush Building Blocks, Perfect for Young Architects Eager to Build and Explore. Seamlessly Integrating with Major Brand Sets, These Self-locking Blocks Open Up Endless Construction Possibilities. Crafted from Durable, Eco-friendly ABS Plastic, They Promise Safe and Long-lasting Playtime. Tailored for Children Aged 3 to 12, the Blocks Encourage the Development of Spatial Awareness and Fine Motor Skills. Available in Sets of 20, 50, or 100 Pieces, Each Comes in a Convenient Sealed Bag for Effortless Storage and Transport. The Light Grey Color Complements Existing Sets, Sparking Limitless Imagination. Features Summary: - Material: Eco-friendly ABS Plastic - Color: Light Grey - Dimensions: Approximately 0.7 X 0.4 Cm - Quantity Options: 20pcs, 50pcs, or 100pcs - Packaging: Sealed Bag for Convenience - Safety Certification: EN71 Certified - Age Suitability: 3-12 Years - Type: Small Building Block, Compatible with Major Brands - Warning: Not Suitable for Children Under 3 Due to Small Parts Fuel Imagination and Technical Skills with These Versatile Building Blocks .