"My brother fell from the tree but did not break anything."

Translation: Мой брат упал с дерева, но ничего не сломал.

[Crisp_by_Yosi]

Однако теперь он всегда улыбается.

[GabyGenzi]

Why do you use с intead of из? thanks in advance!

[Shady_arc]

If you are "on" the tree, you fall "off" it (с дерева). If you are inside the tree, you can fall out of it (из дерева). Unlike in English, in Russian в дереве means being physically inside the trunk or something like that—otherwise you use на дереве. Thus, when you move from that position, it is с дерева.