There are new alarm systems for children.
This video describes a new system called MindMe, which is a small pager device that people can wear around their neck.
When someone presses the button on the page, people can be signalled on their phones. A text message can be sent to 5 different devices.
So it’s a great way for children or elderly people to report that they may have a problem.
This particular device is founded in Australia, however other similar devices will work across the globe.