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Mega blocks, Duplo, and LEGO all fit together despite being completely different sizes : r/mildlyinteresting
![Amazon.com: LEGO DUPLO Marvel Super Hero Adventures Spider-Man vs Electro 10893 Building Blocks (29 Pieces) (Discontinued by Manufacturer) : Toys & Games Amazon.com: LEGO DUPLO Marvel Super Hero Adventures Spider-Man vs Electro 10893 Building Blocks (29 Pieces) (Discontinued by Manufacturer) : Toys & Games](https://m.media-amazon.com/images/I/91YE8jCFuZL.jpg)
Amazon.com: LEGO DUPLO Marvel Super Hero Adventures Spider-Man vs Electro 10893 Building Blocks (29 Pieces) (Discontinued by Manufacturer) : Toys & Games
![Amazon.com: LEGO DUPLO All-in-One-Box-of-Fun Building Kit 10572 Open Ended Toy for Imaginative Play with Large Bricks Made for Toddlers and preschoolers (65 Pieces) : Toys & Games Amazon.com: LEGO DUPLO All-in-One-Box-of-Fun Building Kit 10572 Open Ended Toy for Imaginative Play with Large Bricks Made for Toddlers and preschoolers (65 Pieces) : Toys & Games](https://m.media-amazon.com/images/I/913j3d6QIGL._AC_UF894,1000_QL80_.jpg)
Amazon.com: LEGO DUPLO All-in-One-Box-of-Fun Building Kit 10572 Open Ended Toy for Imaginative Play with Large Bricks Made for Toddlers and preschoolers (65 Pieces) : Toys & Games
![Emmet and Lucy's Visitors from the DUPLO® Planet 10895 | DUPLO® | Buy online at the Official LEGO® Shop US Emmet and Lucy's Visitors from the DUPLO® Planet 10895 | DUPLO® | Buy online at the Official LEGO® Shop US](https://www.lego.com/cdn/cs/set/assets/blt380202f2328ef6ee/10895_alt1.jpg)
Emmet and Lucy's Visitors from the DUPLO® Planet 10895 | DUPLO® | Buy online at the Official LEGO® Shop US
![LEGO DUPLO Classic Heart Box 10909 First Building Playset and Learning Toy for Toddlers; Great for Preschooler's Development (80 Pieces) - Walmart.com LEGO DUPLO Classic Heart Box 10909 First Building Playset and Learning Toy for Toddlers; Great for Preschooler's Development (80 Pieces) - Walmart.com](https://i5.walmartimages.com/asr/9bf3dabc-2453-4116-aacd-f6754c97cc1b.2987ef2905ce1a377deb01d239dc2e89.jpeg)