What was his previous infant care arrangement? Could his action be due to the change in infant care arrangement? Is he feeling down as in infant care the child may not get 100% attention so when he is back home, his trying to get it back? It could be his age too.
My gal is 25 mths she also throws tantrum and throws things when she does not get it her way. [I can sometimes feel the terrible two stage very frustrating]..
Maybe you can ask how your boy is in the centre?