Sturdy Tight：This kids STEM building blocks toys set adopts high quality ABS plastic material, pieces together tightly, standing firmly. Track interface size is scientific design, compact firm , but also easy to move. Include:Total 200pcs parts, include 80 pipeline connectors ,9 sturdy bases, 44 exciting part , 60 pieces 9/16 inch marble(15 plastic ,30 plastic glowing,15 glass) and specification. Funny Toy :Building and running the marbles through the different designs that you can make. Children will thrilled when watching the marbles roll in the exciting part and dorp .It’s really educational and entertaining at the same time. Ideal Marble Building Set Gift: Perfect marble game toy choice for birthday gift, children party favor, after-school fun, Christmas presents and all other holidays. Note: Please contact us freely if you need help . 1.Sturdy Tight：This kids STEM building blocks toys set adopts high quality ABS plastic material, pieces together tightly, standing firmly. Track interface size is scientific design, compact firm , but also easy to move.

2.Include:Total 200pcs parts, include 80 pipeline connectors ,9 sturdy bases, 44 exciting part , 60 pieces 9/16 inch marble(15 plastic ,30 plastic glowing,15 glass) and specification.

3. Funny Toy :Building and running the marbles through the different designs that you can make. Children will thrilled when watching the marbles roll in the exciting part and dorp .It’s really educational and entertaining at the same time.

4.Ideal Marble Building Set Gift: Perfect marble game toy choice for birthday gift, children party favor, after-school fun, Christmas presents and all other holidays.

5.Note: Please contact us freely if you need help .