Amazon.com: uxcell 1 Pack 0.1" Red Polystyrene Foam Beads Ball Round Mini for the Arts, DIY Crafts, Party Decorations, Fillings of Vase Pillow : Arts, Crafts & Sewing
4x Red Sponge Balls 4.5cm Magic Trick Clown Foam Soft 1.75" Party Close-Up UK | eBay
Rainbow Foam Ball - Gopher Sport
Tinkering Toolbox Foam Balls Pack at Lakeshore Learning