The Rat Lab

http://www.bbc.co.uk/cbbc/blastlab/blastlab_game.shtml
It's lab rats we're talking about here, and you can join in the fun with blasting off science experiments to see if they break world records, or exploring the lab for more science fun.

Design a Satellite

Your mission: design a satellite to bounce signals from towers to the orbiting satellite, and back to the more rural and remote corners of the Earth. (Okay, the Earth is round - the more remote "curves" of the Earth - why do we say "corners"??) Students are given parameters to work with the people of Littleton, designing the satellite to get into and stay in orbit, power up, point toward Earth, and of course, relay proper signals where needed.

http://www.eduweb.com/portfolio/designsatellite/

MOH'S DRILL & THE CASTLE OF DOOM!

Uh-oh! The walls are closing in on you in this castle! You need to quickly choose drill bits to drill through various materials in the castle wall. Each drill bit selected must be related to the material that you need to drill through, as it relates to Moh's hardness scale in geology (rocks and minerals).
http://www.fossweb.com/modules3-6/EarthMaterials/activities/mohsdrill.html