Stories for Maths: KS1: Monsters go up the Mountain (Mass and volume)

The monsters go on a camping trip, but things don't go to plan. First Ralf's van runs out of fuel and the monsters have to walk. Then it rains and Ralf's tent starts leaking. Scooter is hoping to see a shooting star. Will he get his wish? This book aligns with White Rose Maths for Year 1, Mass and volume, Step 4. Full and empty.