@TobyPe The best way to set to drones for the classroom is to pair them one by one and take note of the four digit ID of the drone. You can also find this easily using the Petrone app, which is free to download on a mobile device. Once you have this ID number, label each drone. When students open Blockly to pair they can verify which one to pair to by checking the drone label. Second, you will need a laptop device to pair CoDrone Lite with Blockly because the device needs to have Bluetooth Low Energy (BLE) enabled. However, Zumi is programmable with a tablet!