I’ve gone through a few light tables in my day, let me tell you. The first one was a commercially-made one – a big plastic thing that had one of the legs break off and was irrepairable. Next came a little side table that I badly retrofitted with a glass top and a florescent light fixture. Next came the awesome lighted drafting table my husband purchased at an auction, which served us well until the glass cracked. (It morphed into our I-Spy table.) I have to say, though, that none of these options were any better than an old-fashioned overhead projector. The only con is that it is small, but that’s really not such a bad thing. One or two children can play with it, and the other children get the benefit of seeing their work projected. (We move it to the floor and project it onto the wall.) They can be found very inexpensively at auctions, or just put out the word that you are looking for a used one.