Over the years I've made a few projects involving clocks. Most of the time I just use a clock that I bought on sale or from the dollar store rather than buying the clock movements on its own. So I end up having a few extra clock cases lying around waiting for me to find something useful to do with them. I came up with the idea to make a marble maze game a few months back but I was busy with other projects. I noticed that there was a Toy contest underway so I figured that this is a good time to do it.
My marble maze is constructed mostly from craft foam so it is inexpensive and fairly easy to make so it is a great craft for kids. You can adjust the difficulty of the maze by putting the holes in less scary positions along the maze (or don't put any in at all) if your making this with/for younger. children.