Review on Roller Coasters and Waterslides by Marble Genius by Brandon Page

There is a starter kit, fun physics and awesome water slides. This review covers all three. My daughter (2 years old) is still too young to build it so I'm taking it on myself and it can be a little frustrating (if you're building from the top down) due to the lack of hands. to hold everything in place without a few bases you need and they will fall apart if you are not careful enough. But she has fun placing marbles and following them with her eyes after I finally put together a good and satisfying version. I wouldn't step on the tubes but for regular use they've looked perfectly fine for quite some time. No fit problems. I've always wanted one, hehe.