"I thought this would be a fun set for my kids. I knew they probably wouldn't be able to rip the cord well enough but for me to do it and them to watch would be great. I understand it has to be lightweight and solid piece, not buildable for this to be possible. That part did not bother me, but it's ability to fly did. Rip cord copters have been done before and they can fly this barely gets of the holder most the time. The tail piece which stabilizes doesn't seem strong enough to keep it from going out of control. It does require quite a bit of pull to get it flying. There is an awesome welder and female firefighter with a nice fire fighter axe in the set though."