This is a fast DIY idea you could do with small children to keep them busy 😉 .
You´ll just need (white) paper, a pair of scissors, sewing thread, a needle and glue.
You can cut out the shape of the bird and the two wings from the paper (if you have too small children) and just let them glue the wings to the bird. Take a needle to pull the sewing thread through the upper part of the bird. And the mobile is finished.