If you're sick of carrying your phone or mp3 player around with you help could be at hand!
Scientists have developed a new gadget that doesn't have any buttons, and uses a projector your skin becomes your gadget control pad.
Instead of holding your phone you wear a band that projects a keypad on your arm. So, when you tap a key, the sound is picked up by a sensor in that band, that sends a message to the gadget telling it what to do.
Check it out!