What is the amount of dollars someone could pick up in 15 sec. We are thinking of doing this for our local fun fair for charity on the 25th but we are afraid if we put the price at $1 for one and 6 for $5 that in the end we will lose money and we dont want to see that. If we know the estimated amount someone can get out then we might have a better idea about the pricing.

If someone has done this before please let me know how easy/hard it is that would be great.

You could sell raffle tickets $1.00 each/ or 10/$5.00 for a chance to go into the booth and collect even more in 30 sec.
More parents and kids would opt for the 5.00 chance-- more tickets for a better chance to get picked--
not sure how many times you are going to run the booth but if you announce the winner/ or draw the first ticket on a stage in front of the kids and let them know there will be more chances to win.... they will probably go buy more tickets. Let us know how it worked out.

great idea, where did you get the machine. how about putting free food coupons from area Mcdonalds, chilis etc you win a trip to the movies, and sorry try again piece of paper in the machine. for people to get. Years ago I think Carnival shoe store had one of these machines

We are planning our annual School Carnival and have rented a Money Machine from our vendor. We used it last year - this is the machine that blows the money around and the kids try and collect as much as they can in a certain amount of time. I am looking for ideas on how to run this event. Has anyone done it before? Last year we only did a raffle of numbers every half hour but it seems like it was very popular and we could have raised more money doing it a different way. Any suggestions or ideas that have worked for you in the past would be appreciated. Thanks very much!!!