Walkie Talkie

Have a look a "Cobra" I have as had a set from them for a few years now and providing you do not want too much range they work fine. I got mine from Maplins.

peedee

These radios are called PMR radios. 

They are all limited in power and therefore range. Motorola do well regarded PMR radios. 

Buy from an amateur radio shop not a supermarket and you will get good advice. 

Despite being a fully licensed radio ham I have a pair because they can be legally used by anyone and they are good fun. 

Range about a mile, less in built up areas. Claims of much more take with very large pinch of salt 

I`ll echo the above. We`ve got a couple of Motorolas for our kids and they work well.

I got them from Maplin I think and they`re not overly expensive.

My little girl is seven, I bought two pairs of Motorola TLKR 80 Extreme, I think from ebyer, they were about £55 / pair complete with storage boxes and chargers etc

They are excellent, really robust and bright yellow so you don't loose them. They work up to about two miles.

The kids love playing with them

Motorola used to make good equipment. Wouldn't have thought you could go far wrong buying their equipment.

peedee

 Errr !! Don't they have mobile phones these day's ??

No cost calls over short distances irrespective of home or abroad and no phone signal required. They do have their attractions. I would imagine they could be useful for people travelling in tandem to keep in contact.

Just about possible for car to car but you need to be quite close to each other.

Remember the transmissions are not secure. There WILL be someone with a scanner or amateur radio enthusiast listening in so no state secrets.

We have a pair of Motorola handsets and use them when travelling in convoy with others they seem to have a range of about half a mile,and our friends use them for m/van to car if not useing aframe

Alternatives

CB radio, range about 5 miles. (Lot's of strange people swearing)

Amateur Radio on 2 metre band about 30 miles. Licenced operators only.

Other bands available but dependant upon conditions (potentially worldwide) Licenced operators only.

Mobile phone,  Works I suppose.