Order of magnitude

This video compares the size of Earth, Sun, and other planets and stars placed side by side sorted in the order of the size.

Bot Arena 3

A nice flash strategy game with good graphics and sound to keep you busy for a while.

JetSpeed

Jetspeed - you have to accelerate and shoot trucks to get more lives and missiles while Dodge the drones.

Jedi Trainer

Another simple but addictive time waster with very good sound and visual effects.

Telepathy with Robot

Scientists have created a way to control a robot using telepathy. The robot can only pick up objects and move to specific locations, but this is just proof of concept. Don't believe me? Read the following article!

Make 3D Snowflakes with paper

Should be easy and fun to do... if I've time and nothing else to do I might give it a try.