Books, Books, Books - Two
For a crawling baby, I like to leave a trail of books when I leave the room. If you prop them up on your favorite page every few feet, it stalls them as they stop to knock them over and occasionally they even look at the illustrations. It seems to be a great way to also help them ease away from you and start developing independent play. So, many babies start to get nervous when you leave the room, but a book trail is a happy marriage of literature and distraction.