I made this project because my cousin is afraid of the dark. This nightlight has a couple leds but it does the job. Customize the arduino any way you like. This is a quick 5 minute project. Nothing to special. You can hang it over a crib/bed, doorway, decoration or wherever you imagination takes you!
My answers to; Make to learn

What did you make?
I've made a simple programmed nightlight. It runs arduino and it keeps the "boogie man" away.

How did you make it?
I was inspired to make this by dablondeemus's instructable. I turned this into a quick project. I worked by myself on this, and I did change one idea. Instead of polyfill for the cloud I used cottonballs. Cotton balls are of easy access to me.

Where did you make it?
I made this 100% at home. This project connected to other parts of my life with the arduino. I hope to one day be an inventor, and have most of my prototypes run arduino.

What did you learn?
I learned how to do simple programming on the arduino. I really didn't have any surprises during the build except for putting the WRONG glue on the plastic container! The biggest problem I had was running out of cotton balls. If I had to do it again, I would have it run a more complicated arduino.

Step 1: Supplies

Supplies needed;
1 light, transparent container * make sure it's clean
Cotton balls
Thread or fishing line*not pictured
Arduino *I'm using uno
LEDs
Hot/Gorrilla glue*plenty of it

Step 2: Circuitry

For this project I just stuck one led into the Arduino (saves cost)
Stick the led in pin 13 and ground
Quick project=quick circuits
Long lead to 13
Short lead to ground
And plug the arduino in the computer. The led should start blinking.
If you want to add more leds, solder (permanent), tape or criss-cross (temporary) the leds on the original. Pictured. This adds more colors.

Step 3: Making the Cloud

Use the plastic container for the shaping of the cloud. This is also used for the housing of the electronics. Poke holes through the corners of the container. Make sure to leave room for the string. Put string through the holes and hang momentarily.
Hot Glue or Gorrila Glue the cotton on to the container.
Cut a small hole on the side of the box for the power cable.

Poke some holes in the lid to secure the arduino. Either use cable ties, wire or glue to secure them. Put the lid on and add some cotton balls on the lid.

Hang up and have fun with it!!!