1.Fold strap at centre so seam is centred, stitch together, turn seam into the strap. 
2.Fold the bow at centre right sides together, stitch together. 
3.Turn right side of bow out, fold so that seam is centred. 
4.Pull strap onto bow, make sure that seams are not visible. 
5.Stitch the bow on one hat from notch downward. 
6.Stitch hat right sides together on both sides, leaving a gap for turning through, gap should be at opposite side to bow. 
7.Fold the hat and stitch together the last points. 
8.Turn right side out, stitch small hole closed. Fold hat in half, press.
