Oliver and Daniel Horne from Cirencester will present a home-made card to Prince Charlies congratulating him and the Duchess of Cornwall on becoming grandparents to the new Prince George.
The brothers will also hand the Prince of Wales a cuddly toy for the little Prince.
More top news
Celebrations are underway in Bristol as the Old Vic turns 250 years old.
Police say cyber crime in Avon and Somerset is almost doubling every year in the force area.
A postman is walking one of the earliest postal routes to celebrate 500 years of Royal Mail & raise money for charity.