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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 Schoolhouse with Big Building Blocks, Building Toys for Toddlers (42 Pieces) : Toys & Games
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Mega Bloks VS Lego Duplo { Which is Better?} | Lego for kids, Kids blocks, Educational activities for kids
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