Simply roll it through your neighbourhood and you'll gain a lot of attention.
I got the idea of the LED rollie when I was bored, and I saw this roll of solder, but without solder. I found out, that 2 AAA batteries fitted perfectly into the center of the roll.
Step 1: Parts you'll need
a Roll of solder, with no more solder on it.
Some LEDs (I used 2 5mm diffuse blue LEDs and 2 5mm diffuse green LEDs)
2 AAA batteries.
Some hookup wire.
an on/off switch (optional)