Make a Milk Jug Piggy Bank to show that you can use inexpensive recycled materials to create a bank to save your pennies. Demonstrate how pennies turn into nickles which turn into quarters and then into dollars. Don't waste a single penny, it is the beginning of a dollar. Lots more recycled crafts at freekidscrafts.com.
Lots of cool toilet paper roll craft ideas. I always filled the empty rolls with candy and wrapped in tissue with a tie on each end and hid them with the Easter eggs in the yard. Special prizes that fit are good to put inside.