We liked the mini-mood lighting and the flashlights we made but wanted to try something else. Cool Cat has several film canister flashlights in his room and a mini mood light but he forgets to turn them off. So we came up with an improved night light for him that will go on in the dark and off during the day.
This is different then the mini mood light as it does not have a switch, light sits lower in canister (providing a nicer effect), and the light turns on in the dark and off in light.
The pictures do not do this light justice. They look amazing in the dark.
http://www.instructables.com/id/Dark-Activated-Night-Light/ is what we saw on instructables. Please check it out.
http://www.instructables.com/id/Light-Sensitive-Night-Light/ was mentioned in the comments of the instructable above.
Step 1: Material
100 Ohm Resistor
10K or 20K Resistor
Film Canister - Translucent
Wires - 2 About 2 Inches Long
Prototype Paper (Circuit Board) for Option 2 Shown with 20K Resistor
Step 2: Circuit Drawing / Board
Step 3: Understand Transistors
Illustrations taken from http://sunburst.usd.edu/~schieber/psyc770/transistors101.html