Magical Growing Rabbit

For Easter my Aunt gave me a present of a 'magical growing rabbit'. You had to make the rabbit out of paper, put it in a dish and then pour a special solution into it. It looked like this.

In the morning it looked like this

The solution that I had poured in the dish had been absorbed by the paper. The chemical in the solution had then reacted with oxygen in the air so that it formed crystals - making the rabbit look very fluffy!