Ive been doing this for a while, and its pretty fun and safe. HERE IS THE VIDEO
The engines do produce small amounts of thrust. The little amount of thrust is no where close to even an "A" motor but they still are fun to mess around with.
I have yet to get burned from the 50+ static tests Ive done and the propellant burns to fast to catch anything on fire.
While it cant produce the thrust to even lift itself, it is still pretty fun and cheap.