Answer:
I can be as thin as a picture frame but my insides have many things you can see.
I call the trees my home, yet I never go inside, and if I ever fall off the tree I will be surely be dead.
There are 7 birds in a tree. A hunter shoots one bird down. How many birds are left in the tree?
I am your mother's brother's only brother in law. Who am I?
He's small but he can climb a tower.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?