The base of your Learn Arduino system has some additional parts that can be added to enhance the board's functionality and fun!
 
The pack consists of a DFPlayer board which allows you to play sounds or music, controlled from the ESP32 and also has 16 blue LEDs (with corresponding protection resistors) so that you can add a moody glow to your time learning Arduino.  The LED pack can also be linked to your output pins in conjunction with the microphone to pulse with any music you're playing.