Adam Guillain & Charlotte Guillain 
Reading Planet — Faster! — Purple: Comet Street Kids [EPUB ebook] 

Comet Street Kids reading books follow the adventures of Rav, Asha, Tess and Finn, four of the residents of Comet Street. There are 72 exciting stories in the series that children won’t be able to put down. When the Comet Street Kids find themselves in Victorian Belfast, they meet a boy called Johnny Dunlop. Johnny loves cycling on his tricycle, but he just wishes that it would go faster! Thankfully, his father is the inventor, John Dunlop, and he is able to sort his son out with some speedy new tyres!Reading age: 6-7 years