Question: are lego duplo and lego junior compatible?
Answer: ﻿﻿DUPLO® and LEGO® bricks are compatible, so you can use them together. There are some limitations, however. DUPLO® bricks fit best on larger LEGO® bricks and may come off easily from smaller LEGO® parts. ... In case you're wondering, the only DUPLO® parts that don't have the hollow studs are baseplates.