it's just a fun project so feel free to use your imagination and

decide the features!

decide what sensors you want to put in 

decide how many leds you want to use

Here's something I came up with : 

MCU : esp8266 12E
SENSORS: APDS-9960, MPU6050, BMP280, MEMS microphone 
POWER: tp4056 battery charger, mt3608 boost 

 OLED display, Buzzer

https://miro.com/app/board/uXjVPIyU3AU=/?share_link_id=820953040610