Quantity   Component name
32 × WS2812 RGB led
2 × Battery pack 4xAA
1 × Arduino Pro Mini 5v 16 MHz
1 × thin wiring (0.14 mm2 in my case)
2 × BMP180 or BMP085 pressure sensor
2 × NRF24L01 RF communications chip
1 × Arduino Uno
2 × potentiometer
2 × switch Development Kits, Boards and Systems / Development Kits and Boards