We bought a pair of these walkie talkies for our son's 9th birthday and they are proving to be a big hit with the whole family. You can hear voices clearly, although we haven't tried them at any distance yet.
The only slight problem is that the button you need to press and hold to talk is pretty small and quite tricky to press in.

After seeing these on ligo the other day I immediately sent for them—we live in the country and our 10 year old son loves to go camping and take long rambling walks in the woods, and this seemed to be exactly what he needed. As soon as they arrived yesterday (as promised), we gave them a try, going as far as a mile away. The voices were still quite clear at that distance. We have to wait a while though before we get to test longer distances, we plan to try using these on a camping trip next week. The weatherproofing and shock-proofing are a great addition, especially for outdoor activities. A reasonable price, as well. My son loves it.