The Situation Right Now
It's really not super-hard. But you need to do it every election - and just show them how this whole democracy thing works.
If you don't like the actual polls, getting an absentee ballot works great too. In fact, in some ways they are better. Just show your kids what the ballot looks like!
If the polls are usually crowded, check on early voting options!
It's not enough to blindly vote for a party. Tell your kids about the *issues* that you care about - and how that affects your vote.
For bonus points - look up all your representatives on the national, state, and local levels. Talk about our system of checks and balances.
Be sure to mark it on your calendars!