Ask the group who would like some bubble gum (hopefully everyone). Ask one of them to come up and hand them one piece of bubble gum and tell them to give everyone some gum. Of course they will not understand or think it is possible (the disciples reaction to Jesus when he told them the same thing). Then you can say “Let’s Pray”. While you are praying have a bucket of bubble gum hidden and grab it and when you finish the prayer toss out the bubble gum. Its a good parallel and attention getter for the start of a bible study.