Draw the stars:
Have the Momma cut out the stars.
Fill up the sky:
The full tutorial for our hand-drawn, hand-carved rubber stamps is over at Crafting a Green World. Normally, I use the rubber stamp carving blocks to carve stamps for myself, simple shapes such as the ones that I use for gift bags, but the girls had so much fun drawing stamps for themselves that I may soon teach Willow, at least, how to use a linoleum cutter so that she can do her own rubber stamps from start to finish.