When I was cleaning the bathroom, I found this sponge that was literally falling apart. It was new, so I just kept pulling until it came completely apart. It looked really pretty, and decided to do something with it.
Get everything ready, the sponge doesn't have be an exact length.
Tie a simple bow on the sponge. Make it in the middle
Now put the glue gun inside the middle of the knot. Glue the bow, so that it won't come apart.
Now glue the sponge to the headband. Glue down the edges, and make sure the bow stays in place.
Trim the edges of the sponge and you're done!
This is the finished result.