Basically, the more you see the kids, the more you need to be a good example for them. We are also required to come early to church and attend all Liturgical services (Vespers, Matins, Liturgy, and Midnight Praises). Though some do not have the ability to do all those things (such as stay late at Midnight Praises and come early for Matins), the best way to serve the kids is by being an example to them. They won't remember every story you tell them, or every verse you have them memorize, or any hymn you teach them. What they will remember is how their servant acted. How he treated them, and others around them, and the example he set for them.
don't always be the one to answer questions, let other have a chance to answer.
it's to learn humility and also to help the other people to stay interested.the other kids need the experience of answering the questions coz that will help them think about it more.u know, if you are discussing something with someone, u r both thinking about it a lot.but if that person is talking and u say nothing, it's easy to get bored and stop listening.all the sunday school students need the chance to join in with the discussion even if they get it wrong and the teacher corrects them.that way they keep listening and find it interesting.i am telling u this coz i only learnt this lesson around age 12 that i don't have to stick my hand up in class the whole time. the teacher knew that i often know the answer, i did not have to prove myself. i was worried everyone might think i am stupid if i don't have my hand up a lot, but actually that was not true.this is one lesson that is good to learn before becoming a teacher.there are lots more. God will guide you and show you how to learn if you trust Him and ask Him to teach you.