This is an oldie but a goodie--making Christmas trees out of pine cones and pom-poms.
My daughter was so excited when I presented her with a bag of sparkly red and white holiday pom-poms that I picked up for $1 and a pine cone from the yard. (Hooray for the little things in life!)
Perhaps it was the way I placed the pine cone on her art table or she'd seen this before, but without any prompting she said, "I'm going to decorate this as a Christmas tree!"
After creating the little red and white one, she dug into our craft supplies to (successfully) find more pom-poms, and decided that the little tree needed a "rainbowy mommy tree" - naturally!