In my experience, Duplo blocks are worse than any Lego brick. They're not as sharp, but they're pretty solid. They're basically caltrops and they hurt. When

In my experience, Duplo blocks are worse than any Lego brick. They're not as sharp, but they're pretty solid. They're basically caltrops and they hurt. When the kids are at that age, better to buy from brands that use softer cheaper plastic and don't share Lego's commitment to precision engineering.