Well, I'm chalking this up to a learning experience. I boiled the tips in water for 15 minutes, and tried "flipping" them a little too much. (Actually just one side) It cracked, so I have now cut about 3 inches off each end, and my 8 year old should be expecting a new bow soon!!
Just another step in the learning process of making a great bow. As soon as I finish my "new" kids bow project, I'm starting again.