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Best Valentine craft, ever. Who knew that you can use lemon juice as "invisible ink" to write a message, then, if the paper is held over a heat source, the message appears! Stuff it in a bottle, add a handful of confetti, and voila - super creative, pretty, simple, heartfelt and original valentine.
Invisible Ink! Kids can write secret messages to each other and reveal them with food coloring/water. It's lots of fun!
images from Mer Mag's book PLAYFUL! about Childrens Toys and Crafts Made by Hand. Out this fall, 2014!