I found this idea on the Artful Parent blog - one of my faves. This is a totally simple craft that kids of all ages will love.
Start by letting your child choose 3 or 4 crayon colors. Grate them with a cheese grater and keep the colors separate. I used different graters to make the color shavings different sizes.
Using some durable paper (I used water color paper), let your child sprinkle the shavings onto the paper. This is a great time to help your child label the colors and discuss what colors are darker/lighter, what shavings are bigger/smaller, etc.
Once your little one is finished sprinkling, lay some wax paper on top. Using an iron on the lowest setting, lightly iron over the crayon shavings allowing them to melt. Your child will love watching this part!
Finally, encourage your child to use a heart stencil to make valentines.
Cut out and pass out to friends and family. Xoxo...