Ronnie, a boy of 11, has a very rare and bad tumour in his brain and spine.
Doctors gave him special treatments to make the tumour smaller, but it's still not small enough for a special medicine called ONC201.
This medicine helps other people with brain tumours, but Ronnie's tumour is just a tiny bit too big.
Ronnie's family is working hard to get the medicine for him, but it costs a lot of money, so they are asking for help.
