私は前のクリスマスに息子にこのマリオピンズを上げた
I gave my son these Mario Brothers

lapel pins last Christmas.

息子のビーニーに付いたらいいと思った
I thought it would be good to attach to his beanie

今朝はとても寒かったので、出かける前に被って学校に行った
This morning was very cold, so he put it on before leaving and wore it to school