I think (and please correct if I am wrong), they have a table full of various items out for display. You purchase tickets ($1 each, 6 for 5, 15 for 10 - whatever). You then either put your name on the tix (like any drawing) & put your tickets in whatever box you want to.
At the last one a group had outside
walmart, they had baskets that varied from toys, to Pampered Chef, Avon, local hair salon, etc. You could put one ticket in each basket, all in one, whatever you wanted to do. Then each name was drawn out from the basket corresponding to that prize. That way someone doesn't win something they don't want.
And trust me it doesn't always help to have most of them in one basket. I only threw 2 in the Pampered Chef bucket & won that, while I put the rest in the Salon bucket (my DD's fav place) & didn't win that.