313 Pieces Bead Coaster Educational Toy Slope Looping Set Children Assemble DIY Building Blocks Indoor Play Boys Girls Birthday Present Marble Run Toy Block 【Large Set】 A massive set of 313 pieces in total: 250 parts (useful parts for assembly!), 63 balls (including 3 fluorescent balls), and 1 dedicated storage bag (easy storage). 【Endless Ways to Play】 Just like a Pythagoras toy. You can see how children gradually learn to assemble things logically through play. It's fun to think about where the balls will go and build accordingly. The basic way to play is to connect the grooves together to create three-dimensional structures. There are quite a lot of parts, so you can combine them in many ways, repeatedly assembling and disassembling. You can play creatively, and simple shaped building blocks unleash children's infinite creativity! 【Educational Play】 The element of assembling blocks cultivates imagination. There are quite a lot of parts, so you can combine them in many ways, repeatedly assembling and disassembling. You can play creatively, and simple shaped building blocks unleash children's infinite creativity! And, because you follow the balls with your eyes, you feel like you can cultivate a three-dimensional sense, and they will concentrate on playing, so you can also develop spatial awareness. 【Commitment to Safety】 Made of high-quality plastic (food-grade ABS plastic) material and does not use BPA. Please play with peace of mind. Children's safety is our top priority! However, the accessories are very small. Suitable for children aged 7 and up.