Motorola MH230TPR Two Way Radios from Amazon. This was the box it came in:
The instructions were not overly complicated and were easy to follow. We used the radios while in the car in case one group got separated by a few blocks and they worked just fine. There were channels that picked up other conversations, but if you choose the correct channel specified in the manual then you avoid the static and interference.
In addition to backpacking/camping purposes, we plan to have this in our emergency kit. Communication can be crucial in an emergency. If cell phone service were to be interrupted, it's good to have backup radios for your group.
All in all Motorola MH230TPR Two Way Radios set is a good product.