GREENMAX densifier can be used to recycle polystyrene foam beads

71000pcs Foam Beads for Slime and DIY Crafts Supplies(8Pack), Colorful Styrofoam Balls For Making Floam, School Arts, Fillter - Free Bonus Fruit Slice + Googly Eyes + Slime Tools Set – DaisyFormals-Bridesmaid

50000pcs Foam Beads for Slime 0.08-0.18 Inch Craft Foam Balls(4Pack) Ideal For Homemade Slime, Kid's Craft, Wedding and Party Decoration, Bonus Fruit Slice + Spoon + Stir Sticks + Slime Containers –

Marshmallow Foam Beads

Polystyrene Beads - Everything You Need To Know - Eccleston & Hart

Uxcell 0.1 Blue Foam Beads Ball Mini for the Crafts and Fillings 1 Pack

Uxcell Polystyrene Foam Ball Beads Round for The Arts, DIY Crafts, Party Decorations, Fillings of Vase Pillow | Harfington, Purple / 0.1inch / 1Pcs

CCINEE 16 Grams 3-5mm Colorful Foam Beads 6-8mm Assorted Size Foam Beads Balls for Kids DIY Slime Making and Party Decoration 30000pcs

Modeling Clay Foam Beads Play Kit, 5 Blocks of Sensory Toys for Kids F – Madzee

6-8mm 4000pcs Multi Color Foam Balls Mini Beads Polystyrene Styrofoam Filler Bubble Ball DIY Wedding

Crafter's Square White Foam Beads, 28.9-cu.in.