Included is one tablet, tablet case, tablet charger, get started guide, heart rate monitor & squeeze heart.
https://www.mightier.com/faqs/
"With Mightier, calming down is a game and learning how to regulate emotions is the goal. To play, kids wear a wireless heart rate monitor that pairs with our app. As their heart rate rises during play, the games get harder. Then, kids use calming exercises to lower their heart rate and keep playing."