One that I do quite often, but not sure how well it would work w/ 7 & 8 year olds is the "star drill". You stand at home w/ the ball and you place a girl at every infield position (except pitcher) and a runner on first base. You throw (some coaches hit a ground ball) the ball to SS (the runner on first leaves first base running around the bases to home as soon as you make the throw to SS), the SS throws to 1st, 1st then throws it to 3rd, 3rd throws it to 2nd, and 2 nd throws it to the catcher at home, hoping the throw beats the runner. Seems the runners always win early in the year, but as they get better, the fielders should be winning after they get better.
If I can think of some more, I will let you know.
gmroz22, I think once these parents of younger kids realize their kid isn't an allstar after a few years, they settle down. I just got another email a few minutes ago in regards to some BS related to this in our league. We had one parent even threaten to go to the local news and pitch a bitch. Thankfully, that never happened.