The Treasure Box

The Treasure Box is a middle grade novel:

Gus can’t imagine anything worse than having to move to another city to live with his grandfather until things go even more haywire. Besides becoming a target for bullies, while doing a family history assignment for school, he accidently finds a small box of unusual objects in the attic which transport him back in time to experience the firsthand lives of his ancestors in three different periods of history. Support from a couple of new friends might help him in the present, if he could only figure out how to return from the past.