I am in the same boat as you.

My two girls (8 and 10) are also very interested. I put them on the SIM and told them I would buy them a plane once they could meet some minimum goals on the SIM which they did sooner than I expected.

I have two transmitters and a buddy cord but did not want to teach them on the nitro so I bought them a Slow Stick. It's electric and very inexpensive. I found a place to get Li Po's online for 15 bucks and picked up three of them. I have been teaching them for a couple of weeks. One of the nice things about the Slow Stick is that I can take them to any decent sized local park, pull out the plane and we are flying in minutes. They are having a blast and I feel this is a good way to get them started.

My very first time taking one of them up, I switched over control to my daughter and she immediately entered a full speed dive for the ground. I had the elevator servo reversed on her transmitter.