Color Quarks™ are unique construction bricks that fit together like mini puzzle pieces. You can connect them side-by-side or stack them up for cool 3-D figures. Open ended construction toys help children explore creative play while developing fine motor skills, hand eye coordination, logic, creativity, and imagination. Perfect for Individual play but with 8,000 pieces in 10 colors enough for group activities and cooperative play. Great addition to your STEAM, STEM and Makerspace Programs, these fun and quirky building manipulatives support just about any design that can be dreamed up appealing to a wide range of ages. Enough for all your block enthusiasts, with endless design and pattern possibilities! Made from high quality BPA-free and phthalate-free plastic for safe and fun building, counting, and sorting. Color Quarks are a unique multi use construction toy that provides hours of learning through creative play.