Where do they get it?

This was a conversation between my 6 year old son and his friend on a recent trip to Target, where they were both told NO a millions times when asking for this Spongebob/YuGiOh/Spiderman shirt.......

E: My mom said I'm not getting one of the shirts.....
A: Apparently, I'm not either.....

Apparently? I have no idea where he gets his sassyness......really I don't.