Review on 🧱 Discover the Endless Possibilities with COUOMOXA Building Classic: Compatible with Various Sets by Brian Piecuch

Yes, it is compatible with Duplo LEGO. But they are NOT EXACTLY the same as Lego. Photo shows: Blue from this set with central round connector; the yellow is the duplo block and you can see the circle has small indentations in the circle. These little indentations make a big difference in how snugly the pieces fit together. This set mimics the duplo well, but they just don't connect as securely. I recommend this set, but we found that we also needed to mix in some regular Duplo to make the set usable. You can build marble catwalks with the supplied parts, but they are very unstable. You really need the extra duplo pieces to make it stable or the slightest touch will ruin the track.