DH likes playing with duplo, and making very impressive towers and chutes. At the end of the day, I like to tidy up, which involves putting the lego away. I always feel that a box full of individual lego pieces is much more inviting and conducive to imaginative play than a box full of other people's creations, so I routinely break up lego constructions into individual pieces (unless the kids, aged 4 and 3 have specifically told me they want to play with their duplo creation the next day). AIBU to routinely break up DH's creations too? After all, we all know that he can do clever things with bricks because he's nearly 40, but surely there can't be that much emotional capital invested in them. If we have to preserve the great tower of DH then the kids have much less to play with the next day (they're both duplo addicts) and their own creativity gets a bit stifled.