Jack Walter, of Waukesha, Wis., (second from left) uses a propane burner to heat up the envelope of the Kay's WindDancer II hot air balloon as Sarah Poznanski, of Mukwonago, Wis., and Jack's brother Ben, 12, and mother, Kay, stand close by during the Color Aloft Balloon Festival at Central Park in Grayslake. (8/24/19)