"The Sorcerer's Apprentice" by Robin Muller

When poor orphan boy Oliver becomes a sorcerer's apprentice, he enters an incredible new world. He learns wonderful magic spells, the secrets of nature, and how to make healing potions and oils from his kindly new master.

One day the sorcerer goes on a journey. Bored with his endless chores, Oliver enchants some brooms to do the work for him. But when the spell gets out of control, how can Oliver stop the magic?