Preschool teacher Carissa got tested as soon as she heard her former pupil, 5 year old Ezra, needed a liver transplant. She tells us she didn't think twice about donating and wants him to be able to do 'five year old things'. Ezra's mum Karen says she's overwhelmed that someone would be willing to do something so selfless and giving for her son.
Also: A new drug that could protect women from getting HIV with just two injections a year.
The extraordinary Euro 2024 football victory that's helped a country believe in itself.
How volunteers managed to save priceless works of art at the start of the war in Ukraine.
We're back in Finland for an equestrian competition with no animals - where people jump and ride wooden stick toys called hobby horses.
And we hear from Debbie Wileman - whose lockdown social videos have led to a new career as a Judy Garland impersonator.
Our weekly collection of happy news and positive stories from around the world.