Use up broken crayons lying around!
These Valentines are easy to make (ask my 7 year old), have a function (colouring) and are made from old broken crayons (no need to buy supplies).
The longest part is peeling all of the paper off the crayons.
We found a silicon baking tray with heart shaped cups and filled them half full with broken crayons. Place the tray in the oven at 200•c until melted (8 mins for us). Remove and let cool until hard.
They were a hit at dd2's preschool! Idea inspired by the awesome activity book for kids, Boredom Busters by Caroline Fernandez.