Here are some of his notable projects:
* The Gadget Show: He was a regular presenter on the popular Channel 5 show from 2005 to 2015.
* The Gadget Show Live: He hosted the live stage shows that accompanied the television series.
* Bang Goes the Theory: He also presented episodes of the BBC Two science show.
* Brainiac: Bellis also appeared as a presenter on the Sky One science entertainment show.
* The One Show: He has been a guest presenter on the popular BBC One magazine show.
* The Gadget Show: Ultimate Christmas Gifts: He hosted this Christmas-themed special for Channel 5.
He has also been involved in various other television projects, documentaries, and science-related programs. He is known for his engaging and enthusiastic approach to science and technology.