How to download and install Messenger Kids. Open play store on your Android device or App Store on your iOS device. Tap on the search icon at the bottom right corner. Tap on the search bar. Search for Messenger Kids as shown on the screen. Select the first search result for Messenger Kids. Tap on the install button. The Messenger Kids app will begin downloading and installing on a device. Please note that the installation time may be right depending on your internet speed, so please be patient. Once the installation is completed, you can start using the Messenger Kids app on a device. Simply tap open, give all the necessary permissions, then log in to your account if you have one or sign up for a new account. After that, you will be all set to use this messaging platform made for kids. And boom, you have successfully Learned how to download and install Messenger Kids on your mobile device. That’s it for today’s video.