My group had mastered personal space, only food in our mouths & clean up one toy/activity before you get another. Then I had a 1 year old start 2 months ago...who definitely is not comprehending any of those concepts. He is still a crawler; barrels through any activity the older children are doing both on the floor or at the tables. Grabs, mouths and dumps toys all day...so frustrating (also dumps his food; but we're working on that). Suggestions other than the repetition, repetition? I do have another little guy same age that I have none of these issues with (he's a walker).