The boys needed something to do tonight, besides playing with legos and looking at lego creations online, so I assigned them to sort the container cupboard. It had gotten to the point where it was frustrating to try to match a lid with a container, and I knew there were lid-less containers and vice versa. They started out grumbling about having to do the job, but when I told them they could have the mismatched containers they were suddenly enthusiastic and the job got finished quickly! Now the cupboard has lots of room and is tidy (for a short time, anyway).
Baby was entertained for awhile, listening and watching.