I agree children need discipline but people get so judgmental and mad when a three year old is having a bad day. Your kids weren't perfect and neither are any one else's! So stop judging a parents parenting based off a one time meeting.
Finally, a pastor that has read the Bible. True Christians are not homophobes, but the reality is that most people in the church are just that "church people" with no idea what the bible says. Only God can judge.
Laser Beam Challenge - Set up a laser obstacle course in a hallway with crepe paper. The crepe paper will tear if the kids bump into it, letting them know they weren't able to get through the course. For added fun, do this in the dark with glow sticks!