In my opinion, LW isn't for kids. I won't let mine use it at all LW's on my computer only & I do the downloading.
Apart from the dubious content in some of the misnamed files out there (porn), there's just such a high risk of unwittingly downloading an infected file.

There are heaps of good stickies (in red) through the different forum sections...read through those, they're full of helpful onfo & tips for using LW.

Here are a couple to start with

How to find music (has tips for video as well, plus other useful info about keyword filters etc)
WARNING: Viruses on the network you should be aware of
LimeWire FAQ and User Guide


Buying Pro doesn't make downloading of copyrighted material legal in any way