Smart Design - These 0.8"/2cm linking cubes click together with a simple "click" and have a soft "pop", making them ideal for fine motor skills, construction, and creative activities for children aged 3 and up. High Quality -- Made from thick plastic, these linking cubes contain more raw materials than other linking cubes on the market. This makes them more durable and free of sharp edges. DESIGNED FOR SMALL HANDS - At 0.8 inches (approx. 2.0 cm) or 2 cm on each side, the cube is larger than some other construction cubes, making it easier for little hands to maneuver. 10 Bright Colors -- As your child learns the art of creating patterns, or how to apply colors to build their own 3D creations. Inspiring Early STEM - Linking cubes connect on all 6 sides for assembly or building, meaning endless building possibilities. Encourages sorting, problem-solving, counting, construction, creativity, and arithmetic for your child's prime development. Teaches Early Math - Use these counting cubes to teach math concepts such as: word problems, algebra, geometry, measurement, problem-solving, and reasoning. Learning Through Play - Our products inspire children to play with purpose. Play is the best teacher. Our high-quality educational resources cater to the needs of 12 years of study.