Styrofoam Ball & EPS Foam Balls by Shape Innovation, Inc.
2 Pack Large Foam Balls for Crafts, 6 Inch Solid Polystyrene Spheres for Party Decorations, School Supplies, DIY Projects, Modeling, Ornaments (White) - Walmart.com
Foam Balls Toy (1 Dozen) - Only $5.22 at Carnival Source
Amazon.com: 124 Pack Craft Foam Balls - 5 Sizes - Bulk Foam Craft Balls - Polystyrene Foam Balls for DIY Crafting and Decoration for Home or School Craft Project | White Color : Arts, Crafts & Sewing
75-Pack Bulk Foam Balls for Crafts for DIY Arts and Supplies, 2 Inch, Small | Michaels
Tinkering Toolbox Foam Balls Pack at Lakeshore Learning
Rainbow Low-Bounce/High-Density Uncoated-Foam Ball - Gopher Sport