Here is a General Conference activity we created as a family. We took half sheets of paper (any size would work - depending on size of TV) and wrote church topics and principles at the top of each paper. We divided up the papers and had each of the kids draw and color a picture to go along with the church principle listed on the paper. Then we hung them all over the TV screen. When we watched conference, the kids are able to take off the papers as they hear the word said in the talks. It is fun to see if you can get all the papers off the TV before conference is over. It also helps the kids listen to the talks. We always give them a special treat if all the papers come off the TV during conference.
One time we had all the papers off the TV except one. It was called Word of Wisdom. We were down to the closing prayer and the person giving the prayer miraculously said, "Thank you for these words of wisdom..." The kids were so excited - we just had to count it!
Topic ideas: Prayer, tithing, prophet, Jesus, Holy Ghost, missionary, love, family, sacrament, faith, Joseph Smith, scriptures, service, temple, testimony, Sunday, baptism, church, etc.
There is no limit to the topics used. We always let the kids help us come up with the topics.