Hotwheels track

This desing is not compatible with real commercial tracks, but you're kid should still have fun with.

For the curves, I used support material. Once printed, I used a heat gun to soften it and give it a shape.

The walls are may be too small for the curve. but it works.

https://www.youtube.com/watch?v=1B2_3OG8UNo&feature=youtu.be