Peek into your backyard and your art-supply drawer -- odds are you have everything you need to make this bat mobile.

Trace our bat templates onto black card stock; cut them out and fold them according to template instructions. Make a small hole in the center of each bat with a tack. Poke a piece of thread through each hole, and knot it. Tie the bats to a found branch (painting it black is optional). Then hang the branch from two pieces of thread secured to the top of the window with flat thumbtacks.

Card stock, by Colorbok, in Black, $13 for 30 sheets, staples.com. Button-and-carpet thread, joann.com.