All these pictures are sooo cute, but then again it's Alyx, couldn't go wrong with him. :) But in case you can't read the text on his shirt I'll let you know what it says in Spanish.
Soy el hermano mayor.
Need I say more? :)
. . . . .
Well I guess it is in another language, but it's still not that hard to figure out. ;) Use the internet.