The Indian in the Cupboard series

Adventure abounds when a toy comes to life in this classic novel!
It's Omri's birthday, but all he gets from his best friend, Patrick, is a little plastic warrior figure. Trying to hide his disappointment, Omri puts his present in a metal cupboard and locks the door with a mysterious skeleton key that once belonged to his great-grandmother. Little does Omri know that by turning the key, he will transform his ordinary plastic toy into...

As his adventures with Little Bear continue, Omri travels from the French and Indian wars to the present, and then  back to the Old West at the tum-of-the-century.

As Omri, his father, and other members of his family learn more about the cupboard in his room, together and separately they are caught up in several dangerous adventures that reveal more about its powers.