mBot add-on Interactive Light & Sound
Add a shiny tail that made of RGB lights to mBot to make it look like a scorpion. The RGB lights can be triggered on by the light sensor or sound sensor.
Light Chasing Robot
Flash a light around your robot to see at what lengths it will go to chase. Thanks to the light sensors, your robot will turn left when the light intensity on the left is higher; otherwise, turn right. No light intensity difference? It will go straight forward.
Intelligent Desk Light
Turn on or adjust the brightness of this smart desk lamp by touching the line-following sensor. It can also be a voice-activated lighting device with the use of the sound sensor.