Originally launched in 2008, the new Spotter is a lightweight device mounted on a watch-like wristband.

Using state-of-the-art GPS and Zigbee technology, the Spotter can report the location of the child wearing it both outdoors and inside buildings.

On arriving at an attraction, parents hire the wristband and register the device using their mobile phone.

If the child then becomes separated, the parents send a "HELP" text. This triggers the Spotter to display its location every 20 seconds via the KidSpotter web based platform monitored by park security.

The device is tamper proof, sending an alert if it is forcibly removed, or if it passes outside the boundary of the park.

In terms of the deal for park operators, KidSpotter provide the Spotters, chargers, location nodes and web based platform. The park provides the sales and security staff and revenue is shared.

The company also sees possible benefits from sponsorship opportunities, both in terms of branding the device and the text contained in the messages.

Future technical developments planned include a mobile app that can report locations direct to the parents' smart phone.

It is anticipated that a further five theme parks and FECs will be signing up to the Spotter system this year.