For the remote MP3 Player project we used:

• 1 –  power module with battery
• 1 – littleBits wireless receiver
• 1 – littleBits MP3 Player ($50)
• 1 –  littleBits synth speaker ($20)

We created wireless remote to have a dimmer bit to control the volume and a littleBits button ($8) to change the song.

On the MP3 Player module the mode switch needs to be set to next to enable the remote button switch to change the songs. Finally we connected a speaker wire between the MP3 player and the speaker module and we duct taped the batteries to the bottom of the mounting plates.