So you are looking for a 3D printer for kids or beginners? The Tina 2 is a worth a look. It is a WiFi connected printer that works with open source software. It has a magnetic platform and auto leveling. It works with the PoloPrint Pro app on iOS and Android.
Tina 2 has a bendable platform for easy model removal. It has a build volume of 100 x 105 x 100mm with nozzle speed of 40mm/s. It has USB, TF Card, and WiFi modes. You can find out more about it here.