Helping kids listen, love it. Every time the kids hear the speaker say one of these words they can grab a piece of candy out of huge jar. I would change it to healthy snacks, not candy. but good idea nonetheless!
Just found the Red Headed Hostess' website. She is a fireball and has a ton of great LDS information, helps and tips. I especially like her scripture reading aids. You have to read it all, you'll love it.
5 Fabulous Activities + Ways to Keep Kids Quiet During Sacrament Meeting