So, I don't know what to do. My 4 year old deliberately makes a mess... and leaves it. I tell him that the whatever needs to be picked up if he's done, or I'm putting in the saturday box/trash bin... he walks away and doesn't care....but his 6 yo brother does and swoops in and cleans it up. We only have communal toys here... so its not his or his brothers... And, it could be something that 6 yo could care less about -- he does NOT want any toys to go away whether he likes them or not... I feel bad for 6yo... he's always picking up his brothers messes (I thought he'd get tired of it and stop after a bit, but he hasn't...and now 4 yo looks to 6yo to clean up his messes... how would you handle it?
(1 on 1, I can usually come up with something... but add in siblings and everything changes...)