The Number Gnomes are one of Peter's favourite television programmes. It is also Gordon's, Ted's and Sam's favourite TV show. It is educational and uses maths with numbers. There are also several toys of them like shown in Horrid Henry, Nothing But The Truth (dancing) and a comic that Peter has liked in Horrid Henry's Comic Caper. It appears that Stuck-Up Steve does have an interest or at least did have an interest and like Number Gnomes since Henry mentioned it in Horrid Henry and the Scary Scooter.