DescriptionScience and technology small production DIY double track strange slope children manual primary school education experimental model. The double track strange slope toy can be a great way to improve the relationship with your kids! It is a easy use DIY tool.Features- Color: Random color. - Material: Plastic. - Size:20.00X7.00X7.00cm/7.86X2.75X2.75 inch.- The toy is made of premium material, which is safe and durable for kids playing. - A very helpful educational toy. It can train the kid's concentration, hand-on ability. - Bring more fun to your kid, at the meantime, they can learn a lot of knowledge. - Parents and children can play this toy to communication. Very useful. - Kids can easily follow the step-by-step instructions, easy to operate.