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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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Mega blocks, Duplo, and LEGO all fit together despite being completely different sizes : r/mildlyinteresting
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Amazon.com: Mega Bloks Peek A Blocks Construction Site, Building Toys for Toddlers for ages 1 years and up (30 Pieces) : Toys & Games
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Amazon.com: MEGA BLOKS Paw Patrol Marshall's City Fire Rescue Toy Building Set With 32 Jr. Bricks, Marshall and Zuma Figures, Gift Set For Boys and Girls, Ages 3+ : Toys & Games
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