Buzz is for babies?

This morning I pulled out one of Regan's buzz light year shirts for him to wear. He quickly told me no! So I pulled out another toy story shirt and again he told me NO! So I asked him what the deal was because he loved Buzz and Woody over the Summer?!! His response to me "Uzz fo abies" ~~~~~~BUZZ IS FOR BABIES?? Are you kidding me?  I thought Buzz was still cool? Undoubtly not to Regan anymore. I just wonder what happened and who changed his mind. Seems my little boy is growing up and this momma isn't ready for that.