An 11-year-old from Sheffield co-hosted Blue Peter with the show's regular presenters as part of its 45th birthday celebrations on Wednesday.
Ryan Gilpin won a competition to be the guest presenter. In the show he put George the tortoise into hibernation, trampolined and rode a rollercoaster.
A new version of the BBC1 show's badge was launched to tie in with the celebrations, with a snazzy 3D design.
It has been presented to loads of viewers since the show started in 1958.