Hector's World
The Hector’s World Safety Button™ is a child-activated safety tool which children can use if something on-screen upsets or worries them.
The Hector’s World Safety Button is a simple executable file which you can download here for free. The file installs a swimming Hector’s World™ character on the 
computer screen A child can just click on Hector character, who then covers the screen with a beautiful underwater scene and gives the child a positive written message, while encouraging them to get adult help.