(Mom taking dictation for Julian):
can you make a lego ship for me please?
can you come here please?
his [Gabriel's] is much more cooler and mine is just bad.
Gabriel built a very cool battleship, and Julian is feeling jealous and like he can't make anything as cool.
This is different from the usual fraternal fighting -- this is trying to live up to dominant older brother. It will affect him all his life -- starting with Lego creations.