Here are some example projects to make with the Micro:Bit module set.
If you are not familiar with Micro:Bit yet, Follow the "getting started" tutorial over here: https://microbit.org/get-started/first-steps/set-up/
When the PIR sensor detects movement, the light(s) will flash and the buzzer will make noise!
Download the following file and pogram your Micro:Bit with the MicroBit_alarm.hex file
When the button is pushed, the microphone sensor will be activated and the lights on the Micro:Bit will plot the sound level!
Download the following file and pogram your Micro:Bit with the MicroBit_sound_meter.hex file