Entertaining is the way everyone that becomes a cast member behaves. The person behind the mask sure knows how to wiggle, clap, and make funny faces to make your children smile. They will get to you too, so do not be shy on your tours of the Disney Theme Parks. Also, right at the entrance is always a good place to meet a character (almost always they are there).
You need to bring your video camera phone or whatever device records the highest quality video. You can capture and share some amazing video with your friends and family back home. This stuff is so good to do for future sharing too.