If your LO has Lego Duplo, at what age did you transition to the normal Legos? DD is 3 and still plays with her Duplos. DH is itching to buy the normal Lego sets, but I'm wondering if it's too early. At the same time, I don't want to add on to it if she'll like the normal ones as well.
Going by the recommended age range filter on the Lego website, there's an overlap in sets. Both the Duplos and the Classic Legos fit into her age group.