A hanging bat I made for Halloween. It flaps it's wing when you pull the string. Made from 1/8 in. plywood, I hung mine from a dowel but there's a hanger in the file. Scale it up or down and populate your bat cave.
The points in the file mark where the holes should be drilled. Keep them just small enough to fit a few loops of thread or fishing line through. Once you cut out the pieces, sandwich the body between the two wings, line up the holes and clamp it with a clothes pin or whatever you have on hand. Use a small dowel to help keep the loops big as you tie the wings and body together. If you tie the loops too small, the wings won't flap.
Now cut three 24 in. lengths of string or fishing line. Take each end of a piece of string and feed them up through a wing. Feed them up through one end of the hanger, wrap once around and feed them back down through the same hole and tie a big knot. If you kept the holes small the knot won't pull through the hole. Do the same thing once more for the second wing. Now take the third string and feed both ends down through the center hole of the hanger, wrap it once around, back up through the hole and tie a final big knot. The hole in the bottom of the body is for the weight to level out the wings and keep it stable. I hung a small 1/2 in. wooden bead from mine. Scale it up or down and tie your own weight underneath. The head and ears go where you think they do.