Luke's new favorite thing is to find coins in the house and put them in his piggy bank.  As soon as he finds one he yells, "coin in the pig!" over and over until he gets to put it in.  And somedays if we need a quiet calm down activity, I just take the coins out and let him put them in over and over.  It will keep him occupied for a good 10 minutes!

Luke's 'smile' face