Yes it is definitely fun, and not a HUGE risk playing nickels as you're only betting $5 for ten hands. If that's too much you can always just do 3 or 5 hands.
@kjell28 put in a $20 sitting next to me at Cosmo and I told him he needed to play ten hands... He said no then his twenty would go too fast (because theoretically, that would only be four plays). I said don't believe me just watch... HHH. He didn't get any huge hands but got enough to keep him playing. Then when I got my RF hit and was waiting for my handpay, he started to get some good hands... I believe he had a 4OAK of 3's with kicker with a 2x multiplier for 1600 nickels and then a 4 Aces with kicker for 2000 nickels along with some other nice hits... cashed out with over $250 from original $20 investment!