Vintage Square Dense Foam Blocks for Crafts

They are dense, but squeezable.

PROSOURCEFIT Thick Exercise Puzzle Mat Blue 24 in. x 24 in. x 0.75 in. EVA Foam Interlocking Anti-Fatigue (6-pack) (24 sq. ft.) ps-2998-extp-blue - The Home Depot

Large Craft Foam Block for DIY Arts and Crafts (17 x 11 In) – BrightCreationsOfficial

FUTURE FOAM 2 in. Thick Multi-Purpose Foam 10030BULK2 - The Home Depot

FoamRush 4 x 60 x 80 Upholstery Foam High Density Firm Foam Soft Support (Chair Cushion Square Foam for Dinning Chairs, Wheelchair Seat Cushion Replacement)(4 x 60 x 80) : Arts

Foam Blocks

Brand polystyrene block, high density, easier to cut and sand to shape. Decorate with paints, flowers, ribbons, twine, sequins and more into beautiful DIY artwork. Create a one-of-a-kind centerpiece for your upcoming wedding, party, birthday. Suitable for models, letters, wall decoration, artificial flower arrangements, thermal insulation packaging, gift packaging filling.

AMZQNART Craft Foam Blocks, 2 in Thick 17x11 EPS Polystyrene Rectangle Foam Blocks Packs of 3 Pcs for Art Sculpting, Sculpture, Modeling, School

They are dense, but squeezable.

Vintage Square Dense Foam Blocks for Crafts

Square & Rectangle Foam

20 Pk Foam Blocks for Crafts, Polystyrene Squares for DIY Sculptures, 4x4x2 in

2 x 18 x 108 Upholstery Foam

2pcs Styrofoam Plate Craft Foam Board DIY Model Making Material Miniature Scene Terrain Landscape Floor Base Platform Foam Block - AliExpress