There are numerous websites and free apps available that children can use to help themselves calm down when experiencing a negative emotion. Here are the following websites and free apps that I use with children/recommend children to use:
GoNoodle Website and App (Apple and Android)
Note: Type "mindfulness" or "calming" into the search bar.
Calm Website and App (Apple and Android)
MindYeti Website and App (Apple)
Relax Melodies Website and App (Apple and Android)
Childline
Susan Kaiser Greenland Website
Stop, Breathe, & Think Kids App (Apple and Android)
Breathe, Think, Do with Sesame Street App (Apple and Android)
DreamyKid App (Apple and Android)
iZen or Relax App (Apple)
Three Good Things App (Apple)
Insight Timer (Apple and Android)
SuperBetter (Apple and Android)
MindShift (Apple and Android)
Chakra Chime (Apple)
Tangram! or TanZen (Apple and Android)
Note: Only for children who like a challenge!
Draw with Stars (Apple)
Doodoo Pad (Apple)
Magic Fingers (Apple)
Spiral Painter (Apple)
Mandala Coloring Pages
Change to Chill Website
Note: For Teenagers