FlipaClip

Chloe has been using this app and loves it so much she asked me to let you all know about it too!
It is a drawing tool that layers your pictures so it builds up like a cartoon, i've tried it and it's lots of fun!
You don't need the paid version (which is a little expensive for an app) you can get lots of use out of the free one. Always ask permission before you download anything, have fun!