My father bought me a model airplane for Christmas.
Literal
Father [topic-は] Christmas [on-に] me [for the sake of-のために] model airplane [object-を] bought-for-me.
私のために + てくれた doubles the benefactive marking: 'for my sake' (explicit purpose) and てくれた (the favor was received). 模型飛行機 ('model airplane') is a descriptive compound: 模型 (model) + 飛行機 (airplane).