just to add....and sometimes its good for you and the child to just sit back and let them be FREE be KIDS! As long as they are not harming anyone or aiming to break a toy - let him play.
If you are worried that the toys will be broken THAT much then buy used ones for daycare use only, otherwise it's fair game. If there are special items put those away, out of reach.....you can't guard every toy 24/7. Now I don't mean they should be breaking things on pourpose but accidents happen. If you're on them TOO much they wont know how to play without 'someone' telling them how to.
It also depends how long this child has been with you, it seems that we remnind them of the rules more often in the begining....they will learn them and you'll only have to say a few times vs 10000x's over. When I yell out that lunch is ready my 3 & 2 year olds already start cleaning up the toys....they know the routine and what's expected of them.