Books with title Lin's Backpack

Invites young readers to guess what is making Lin's backpack jump.

Although Jack owns a multitude of toys and games to play with, he is bored during summer break and decides to go on an adventure. He grabs his backpack and leaves home. Along the way he meets surprising new friends. He collects something new from each encounter, but the most important thing he finds can't be carried in a backpack.