Trying Gravity with pretend pupils, and the music
Add practice pupils to see a full game; set the volume.
To try a game with a full class, launch it and use "Practice with pretend pupils" on the console. Add 5 to 30; they answer by themselves, getting about 70% right, and play in team races. Their answers are never saved to your class. Remove them when you're done.
The board plays music in the lobby, during questions, in a team race and at the finale. Set the volume or mute it from the speaker button on the presenter controls, or the volume slider on the console. Browsers only play sound after you have clicked something on the page.