Some people look down on this challenge. So smart!

How's your number game??

Can you make the longest possible chain with limited materials?

Do you see yourself winning, or your opponent?

Can you figure out the combination?

Build a Catapult that can launch either paper or cotton as far as possible!

Greater than 2 feet gives the base points. Gold medal winner gets an extra 400.

Which site will be "above average" ?????

You have one guess! Take your time!

Ready..Steady...Build! I bet you can't match my record-setting tower height of 11 inches!

Will your helicopter spin?

Push your way to the top! One site wins the Gold for this event!

S_n = n*(n+1)/2 Well..that is what KF Gauss says!

Bring in the reinforcements...seriously!

Step into the spotlight and win the gold!

Build 4 tops and spin spin spin. User a timer to see how well you've done.

Will it Leak??

How many squares and triangles do you see?

Cut a hole in a half sheet of 8.5 x 11 inch paper and then step through it. EASY!

One chocolate drink to rule them all...