Here’s a cute idea for art. A fingerprint of you and of the one you love. Then make art of it. A great custom piece! See the linked picture and directions.
Click title for link at Craftzine. You could definitely get your kids involved making all sorts of pictures with finger prints. Butterflies, flowers, & frogs, to start with. They will have fun creating all sorts of scenes with this. These might even work as greeting cards and gift wrap. They could make adorable gift tags with just one fingerprint next to their name.