Kids love pin trading... and to be honest, it can be a great time for adults, too. However, it can seem a bit intimidating - especially if you've been reading information from "serious" pin traders.
Don't despair! Pin trading is for everybody, and as long as you observe some simple coutesies, there is no "right" or "wrong" way to trade/collect pins.
Here is a link you might enjoy, and that will defintiely help answer most of the questions that rookie pin traders might have.
If you have any more questions, ask here, or feel free to PM me. Remember, the point is to have fun!