NFL star Tom Brady's wife, Gisele Bundchen has revealed her son Benjamin Rein, 10, asked for donations instead of gifts for his birthday after realising the amount of plastic floating in the ocean.

"One story that I can remember is when we were at the beach and my son Benny found plastic in the ocean. He was so upset, and I explained to him that this is what happens after we discard things; they go to landfills and sometimes end up in the ocean," the model was quoted as saying by People magazine.