Hot answers tagged safety
I can't comment on why Lego stopped selling Primo. But I can assure you that Duplo is fine for children. The smallest pieces are way too large to choke on, as far as I can tell. Small babies probably don't know how to put the pieces together very well, but that doesn't stop you from building a little house or car or something and letting them play with it.
The complexity of the model and the expected time to complete it will increase with the recommended age. Lower aged sets, like the Juniors line, feature builds that rely heavily on standard stacking and more basic bricks. As the age recommendation goes up, you'll see more advanced building techniques such as offset stacking (think stair stacking), studs ...
Only top voted, non community-wiki answers of a minimum length are eligible