TIL that Lego blocks and Duplo blocks are compatible. Mind blown : r/todayilearned

Lego Duplo and normal lego pieces can connect?! : r/lego

Lego Duplo and normal lego pieces can connect?! : r/lego

The Best Building Toys, Blocks, and Magnetic Tiles for Budding

Lego Duplo and normal lego pieces can connect?! : r/lego

TIL other companies used to actively market against LEGO. : r/lego

This is LEGO Primo brick on top of LEGO Duplo brick on top if LEGO

Discover Limitless Building Fun with SparksMag 18 Pcs Magnetic Brick Tiles!Looking to take your building adventures to the next level? Say hello to

18 PIECES MAGNETIC BRICK TILES - DUPLO AND LEGO COMPATIBLE

Lego Duplo Blocks - Lot of 320 Random Pieces - People Bases

Several lots with a combined 410 duplos, including pixar cars, trains and planes, construction equipment, lots of people, animals, accessories,

Huge 410 piece duplo combined sets

Lego Duplo and normal lego pieces can connect?! : r/lego