Four teens (16-20) and I accepted the challenge to save the alien. Lots of puzzles to solve and when we got stuck, there was help easily available. At one point one of the things we were supposed to do malfunctioned and they had to come in to fix it but they stopped the clock so it was no problem. They noticed the problem right away, so they were definitely paying attention back there. We were able to accomplish our mission successfully, which added to the fun.