I'm a novice builder only built the 2 pack of beginner rockets before this one. I must have gotten lucky - this thing blasted off and might have hit the moon, I don't know b/c it went so high I couldn't see it anymore. On the way down though, the top didn't open and the streamers didn't deploy. I'm glad the kids an I weren't near where it landed b/c it bored a 4-5 inch hole into rock hard Arizona desert on impact. I imagine that would have hurt - Next time, I'll invite people I don't like and hope for the best.