I tried fun foam, that holds as well as Gripzies at a fraction of the cost! They can grip single strand of hair, but can't hold the jiggling. LOL
I have not try felt... and asking around and hoping for some answers. Otherwise, it would mean making a trip just to get felt. Ugh!
I did try waffle liner. They work great! But they are only available in blue here. No whites or pinks. It looks really weird in blue.