I guess a LEGO Fan or Legophile.
Grown ups that play with Lego are sometimes called AFOL's (Adult Fan of Lego).
One name for someone who likes to talk a lot is "chatterbox". An adjective for someone who likes to talk a lot would be "gossipy".
you call them bitefull
a traveller...
Pyromaniac.
geek
sharp
belligerent
a geologist
a traveller...
There is no special name for a person who likes squirrels.
Imaginative
blademaniac