My DS is 19mo and LOVES playing with Duplo. Unfortunately all he wants to play is "rip the blocks apart and fling them away!" No interest at all in fitting them together, he's made a couple of half-arsed attempts to bang one at the other and then nada. I spend HOURS showing him how it works and it's beginning to drive me nuts!
Has anyone else had a Derek the Dismantler instead of a Bob the Builder? Any games that might help?