Something that's diverting is a pleasant distraction. A movie on a long bus ride — even a bad movie — is diverting.
The adjective diverting describes anything that grabs your attention, especially if it's entertaining and distracts from something less interesting. Spending time with a friend can be diverting when you're waiting to hear important news or get the results of a big test, and a good, diverting book is the perfect thing to take on a boring train commute. Diverting stems from the verb divert, or "distract," from its Latin root, divertere, "to turn in different directions."