Best selling talking tubes can be used in any educational setting, both indoors and outdoors, to develop children's communication, personal and social skills. Can be used to communicate across a small distance, between rooms, across an outdoor area or even between the indoor and outdoor environments. This simple but effective telephone system uses tough plastic flexible hollow tubes with rubber ends for the colorful plastic handsets or connectors to be pushed in. The talking tube set includes 2 handsets and nearly 10 feet of strong yellow, hollow flexible tubing. Handsets simply plug into the ends of the tubing.