This lot seem REALLY excited! And so they should be - they're watching the dozens of tiny fish they've been helping to look after finally being released into the wild.
NR's Helen hooked up with the kids in south London to see the tiny trout take their first swim in a local river.
In December, the school got special tanks for the fish. Trout eggs were added, with the kids overseeing the hatching, feeding and progress of the creatures.
Each tank aims to recreate the natural conditions of river life. It's time to say goodbye. Helen's pulled on her wellies to help two volunteers with this important task.
Wow! They've got quite an audience. The scheme is called Trout In The Classroom and it's teaching loads of kids more about the natural world.
In the wild, around 10% of the baby fish survive. But the classroom scheme is so successful, that research shows that survival rates are higher for these fish.
This is what trout look like when they're fully gown. The scheme we visited has been running for seven years - and big fish are now breeding in their river. Well done, kids!