Meet Harriet and Jessica, twins aged 10 from Fenland Gymnastics Academy.
They are not only raising money for their club right now with a sponsored walk to Hollywood, California but also have been collecting rubbish as they rack up miles on the equivalent journey around where they live in Outwell.
In just one session they found an entire bathroom dumped for somebody else to clear up, various items of underwear, shoes, vodka bottles, Starbucks cups, rubbish from KFC and McDonalds, a Chinese takeaway, and many drinks cans and bottles.
In total, they collected eight full bin bags in just half a mile stretch of road.
Please help them achieve their target of £200 for doing such an amazing thing if you can.