Comment Re:Cheap = Good for parents (Score 4, Informative) 576
We bought some Mega Bloks for our son, but the plastic they used (polypropylene?) is too soft to keep a good grip. Duplos are made out of ABS plastic that holds its shape much better, so the blocks stay locked and structures stay together. We can't even build a simple staircase out of Mega Bloks without frustration. Constructions have to have twice as many Mega Bloks as Duplos to have the same strength.
While though the Mega Bloks are cheaper, we'll probably stick to Duplo and Lego for the future.