A great option for your project instead of a traditional on/off switch. This touch sensor can turn your 3 Volt LEDs on and off.  The sensor is 2Amp so it can run up to 90 LEDs.

The touch sensor comes in 2 options.  

1. Touch Disk - Touch the Disk to turn on your lights and again to turn them off.  The disk is 10mm in diameter and 2.5mm thick
2. Wire Type - This type has a wire that you touch to turn on or off your lights. Locate the end of the sensor wire where you want.  This is a nice option if you do not want a visible disc

Use this sensitive touch sensor with a 3 Volt Wall Adaptor, AA Battery Holder or AAA Battery Holder.   The coin cell battery does not work well with the Touch Sensor Switch, occasionally the light cannot be turned off or on.  If you want to use the touch sensor switch with a coin cell holder you should get the coin cell holder with switch.  If the light gets stuck in either on or off, the switch can be used to re-Set the touch sensor.

For the power side, you can run this sensor with:

AAA Holder/Switch

AA Holder/Switch

3 Volt Adapter

up to 90 of our 3 volt lights, or 10 of the Mega:

3 volt Bulb Style

3 volt Chip

3 volt Mega

This touch sensor can take the place of a normal switch. Since the AA holder has a switch, you can just leave it permanently in the on position.