sturdy foam blocks

Melissa & Doug Extra-Thick Cardboard Building Blocks - 24 Blocks in 3 Sizes: Educational Toys for Toddlers

PICASSO-TILES 250PCS STEM Building Block Construction Kit – Engineering Toy with IdeaBook, Power Drill & Clickable Ratchet for Kids

Timber Blocks - 100 Piece Wooden Block Set

Melissa & Doug K's Kids Match and Build Soft Blocks Set: 14-Piece Educational Toy for Toddlers

Melissa & Doug Blockables Farm Snap And Play, Mix And Match Connectable Wooden Building Blocks Play Set - 56Pc

Kproduct4u Co-Block with Car Non-Toxic BPA Free Soft Jelly Blocks Toy, 10 pcs

PICASSO-TILES 201PCS STEM Learning Block Construction Kit with Power Drill & Clickable Ratchet, Educational Engineering Toy Set for Kids Boys & Girls

PICASSO-TILES 400PCS Straw Construction Building Set, STEM Educational Interlocking Toys, Creative Builder Kit for Kids Boys & Girls

PICASSO-TILES 1016PCS Magnetic Tiles & Bricks Combo, STEM Construction Educational Toy Set for Kids, Compatible with Major Brands

Gymax 12-Piece Foam Building Blocks Set 5.5" x 5.5" Soft Stacking Foam Cubes for Toddlers Kids Climbing & Play Foam Building Toys

PICASSO-TILES 108PCS Interlocking Disc Building Blocks Toy Set for Kids

PICASSO-TILES 136PCS Pipe Tube Wheel Construction Building Blocks Set – STEM Educational Toy for Kids

PICASSO-TILES 100PCS 0.5" Pixel Magnetic Puzzle Cube Set, Mix & Match STEM Building Blocks, Sensory & Educational Construction Toy for Kids

Comfy Cubs Stacking Rocks 36 Pieces, 36 months+, Toddler Stacking Blocks, Wooden Rocks Sensory Toys

MindWare KaBlocks Blast Foam Building Blocks Set — Build, Launch & Rebuild Fun

12 Pack Mini Animal Building Block Sets for Kids, Party Favor Toys, Classroom Prizes, Goodie Bag Stuffers, Small Building Kits for Boys and Girls

PICASSO-TILES Magnetic Tiles for Kids, STEM Building Blocks Educational Toy for Toddlers Ages 3 and up