We mixed a little squirt of school glue in some water.I've found if you put a paintbrush in a preschoolers hand, you have them happily busy for hours! So painting the glue/water mixture on anything = happiness!
I used a little glass Pyrex dish as a mold and let her go to town.
After there is a good thick layer on let it dry overnight.
Pop them off the dish when completely dry. Some came right off with a little twist, some needed to be loosened with a butter knife.
Now the little paper nests are ready to embellish!