Here are a couple of links that can help.
This Article is specifically for getting a backup into iTunes
How do remotely and automatically backup my child's Apple device to iTunes?
You may also be interested in some best practices to get data from your child's device using iTunes
Getting started with iTunes. Tips for early success
Here is another option if you are trying to find the complete step by step guide to connect to uKnowKids with iTunes.
How Do I Connect My Child's iPhone to uKnowKids with Apple iTunes?