Nine-year-old Jacob Thompson in Portland, Maine was diagnosed with a form of nerve cancer called neuroblastoma when he was five, and tragically, a few weeks ago, his doctors said he only has about a month left to live.

Here's your chance to do one tiny thing to make the world a better place today. Since Jacob may not make it to Christmas, his family is celebrating it early this year. They've asked for people around the world to send him Christmas cards if they can.

His dad says, "He got some cards from this Halloween, and he opened up and saw them and it was like getting a gift. He read it to us and had a big smile his face and his nose scrunched."

If you want to join in and send him one, they go to Jacob Thompson, c/o Maine Medical Center, 22 Bramhall Street, Portland, Maine, 04102.

Read more at CNN.