。
My mother made me a doll.
Literal
Mother [topic-は] me [for-に] doll [object-を] made-[benefactive-てくれた]
人形 (にんぎょう) is the standard word for 'doll,' literally 'human-form.' The benefactive auxiliary ~てくれる ('do for me / for my benefit') turns the act of making into something received as a kindness; ~てくれた is its past tense. Without it, 母は人形を作った would just say 'mother made a doll' — the ~てくれる is what frames it as done for the speaker.