1. Measuring - use toilet paper as a measuring tool (count the number of squares to determine the length). How many toilet paper squares to cross the room? How many around your waist? What about Mommy's waist? etc..
2. Science - what happens to toilet paper when it gets wet? Compare the strength of different brands of toilet paper. Turn on a fan and see the effects of wind on strips of toilet paper.
3. Art - use a medicine dropper and some food coloring to decorate toilet paper, use it in crafts just like tissue paper, make a mini-pillow out of felt or construction paper and stuff it with toilet paper, or try your hand at making sculptures with wet toilet paper.
4. Physical Movement - hang tissue paper from a doorway and have the kids jump and try to grab it, or use as streamers for dancing.
Maybe next time. Here are some of the ideas my kids had in mind..