My yard is full of acorns. Thousands of them. It's also full of downed branches. So we end up with mini acorn birds in oak birdhouses. Silly yes, but with a craft show next month, I think that they will be easy cheap sales. They would also make dandy Christmas tree ornaments. The largest are 2" tall with a 1/2" hole for the bird, the smaller ones are about an inch tall with a 3/8" bird hole.