You'll need an iDevice, Android device, or Chromebook to run your Sphero. Apps are available for different levels of use. Read about device compatibility.
Sphero Troubleshooting - Note that each Sphero will attempt to pair with the last Bluetooth device it was paired with. To avoid confusion when pairing, identify which device you will use for each of the two Spheros in the kit, label devices accordingly, and use them consistently.