C.M.
dont say like that, he is not strange but he gets used to people or things after observing and after getting familiar.... if he goes to different day care, then he dint get time to get familiar.... he needs to get familiar to people for longer so that he think they r nice to get familiar, and one more thing he is very cautious. and u said he grandma or aunt, comes every other week, but for how many days they stay with him? if they stay just for few hours and then leave... then he dint get enough time to get familiar. some kids are very cautious, and they observe everything. he is with u guys since he was born, so he know u r his parents so he is active and he loves u guys. so dont think he is odd.... but he is a very care full kid. be happy and u may miss this in future....