Who is this kid?

Can someone please tell me who this young man is?  My parents took the kids to McDonald's for lunch today and my mom texted me this picture of a big boy.  This kid is sliding, drinking out of a strawed cup and he looks very, very old.  This can't be my son.  My son is still a baby.  My mother should really stop taking pictures of extremely cute toddlers at McDonald's and texting them to me.  This is one cute kid but he looks way too big to be my baby.