Fun idea

I'm curious about what you think. I've been wanting to get something like this for the boys for a while but haven't been able to find one in the teacher stores here. I'd like to make one but I'm not very creative. I wish, but if you have any ideas or know where I can find another one I'd love to hear from you. Here is the link to see what I'm talking about and a picture too. Thanks!
Update: We just went ahead and bought it. I'm not Betty Homemaker, I need a course. It was just easier, I should have at least tried. Oh well.