Amazon.com: 4-Pack Multi Vehicles Transportation Set - Big Building Blocks Compatible with Lego Duplo - Police Car, Fire Truck, School Bus, Motorcycle Accessories Kids Early Education Toys : Toys & Games
JIXIn Building Kits Compatible with LEGO DUPLO/Crossbow/Plane/Robot Dynamic Gear Building Toy Set for Preschool Kids/Erector Set 218 PCS Classic Big Blocks STEM Toys/Gift Toy for Kids Age 3 4 5 6 7 8+
Track Adaptor for Duplo to Wooden Train Track Compatible With - Etsy
Large Building Blocks Lego Duplo Compatible | Lego Duplo Compatible Bricks - Brick - Aliexpress
Mind blown. 30 years with Lego and I just realized duplo are compatible. : r/lego