- London : Bloomsbury, 2014
- 32 p. : col. ill. ; 28 cm. pbk
Rueben and Felix are best friends, and what they like doing best is blowing bubbles - the bigger, the better! It all starts to go wrong when Rueben challenges Felix to a bubble-blowing competition. When they sabotage each other's bubble machines, the results are disastrous. It's time to stop fighting against each other and pull together!