![Amazon.com: Brickyard Building Blocks 177 Pieces Large Building Block Toys for Children Ages 1.5-5, Bulk Block Set, Compatible with Duplo (177 pcs) : Everything Else Amazon.com: Brickyard Building Blocks 177 Pieces Large Building Block Toys for Children Ages 1.5-5, Bulk Block Set, Compatible with Duplo (177 pcs) : Everything Else](https://m.media-amazon.com/images/I/81nAqYHqmgL.jpg)
Amazon.com: Brickyard Building Blocks 177 Pieces Large Building Block Toys for Children Ages 1.5-5, Bulk Block Set, Compatible with Duplo (177 pcs) : Everything Else
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Amazon.com: 3-in-1 Kids Activity Table, Compatible for Lego Duplo and Mega Blocks, Build and Learn Table, Building Blocks Kit - Foldable Activity Desk, Play Board, and Toy Storage for Toddlers : Toys
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Mega blocks, Duplo, and LEGO all fit together despite being completely different sizes : r/mildlyinteresting
![Amazon.com: MEGA BLOKS Fisher-Price Toddler Building Blocks, Green Town Grow & Protect Farm With 51 Pieces, 3 Figures, Kids Age 1+ Years : Toys & Games Amazon.com: MEGA BLOKS Fisher-Price Toddler Building Blocks, Green Town Grow & Protect Farm With 51 Pieces, 3 Figures, Kids Age 1+ Years : Toys & Games](https://m.media-amazon.com/images/I/81eZ2QtYFiL.jpg)