Cute tiny enclosure for the great Micro Word Clock by Daniel Rojas.
https://github.com/formatc1702/Micro-Word-Clock

The microcontroller and LEDs are powered by 3x AG13/LR44 alkaline batteries, which are very common and cheap and a CR1220 is used for the real time clock.

I used this pushbutton:
http://www.ebay.de/itm/100Pcs-Push-Button-Tact-Switch-4-Pin-Smd-Micro-Switch-6-6-2-5Mm-Tactile-Switch-P-/331928441992?hash=item4d487a1488:g:-YwAAOSwKOJYIZ5N

And a single DIP switch is used as a power switch:
http://www.ebay.de/itm/10pcs-2-54mm-Red-Pitch-Slide-Type-DIP-Switch-1-Bit-2-Bit-3-Bit-4-Bit-5-Bit-6-Bit-/331311690635?var=&hash=item4d23b7338b:m:mpc81MzzplMLqZs9QUWzF5w

I added a schottky diode for reverse polarity protection, which was soldered directly to the switch.

For the LR44s these battery holders were used (trimmed a little using scissors):
http://www.ebay.de/itm/Metal-AA-Battery-Spring-Contact-Lamination-Plate-Terminal-Silver-Tone-30pcs-/121938564123?hash=item1c641ad41b:g:MPYAAOSwPCVX~xga

For the CR1220 i made 2 simple contacts out of tin.

As an extension for the pushbutton a M2 bolt was used which was cut to size after the device was finished (you can see it sticking out of the back cover.

2 tiny 1.5mm plastic screws out of some scrap electronics device were used to hold the back cover in place.

Ultimaker

Ultimaker 2 Extended

No

Yes

0.1mm

30%

Print using supports! I printed it in black ABS.