Here is an easy way to make a light box for your child to experiment with:
Line a clear shoe box sized container with waxed paper and tuck a strand of Christmas lights inside. After you snap the top on, leave a small end of the strand and plug hanging out of the side of the box. Plug it in and have fun! For more details on how to make this diy light box, visit No Time for Flashcards .
This post at Teach Preschool also shows how to make a light box out of a strand of rope light and a scrapbook paper storage container.