The Indian in the Cupboard by Lynne Reid Banks

Description:

The Indian in the Cupboard is the first of five gripping books about Omri and his plastic North American Indian – Little Bull – who comes alive when Omri puts him in a cupboard.

For Omri, it is a dream come true when the plastic American Indian he locks into the old cupboard comes to life. Little Bull is everything an Indian brave should be – proud, fearless and defiant.

But being in charge of a real, live, human being is a heavy responsibility, as Omri soon discovers. And when his best friend, Patrick, is let in on the secret, he soon realises that life-changing decisions lie ahead.

Reference: https://www.harpercollins.co.uk/9780007309955/the-indian-in-the-cupboard/