These bikes will introduce children to gears, while some models even have front suspension, so theyâll start to look very similar to an adult bike. 1  Claud Butler Phobos 20 2017 Kids Bike Â£148.00. 2  Dawes Lil Duchess 18 2017 Kids Bike Â£148.49. 3  Claud Butler Flame 18 2017 Kids Bike Â£170.00. 4  Dawes Blowfish 18 Inch 2017 Kids Bike Â£170.99.