These challenges have been submitted by visitors of the site:

Challenge 13 - Held High in the Sky (Submitted by Karla Jacobson, Fridley, MN)
You are given a file folder, 2 sticky mailing labels, 3 paper clips, scissors, 50-100 marbles, carboard tube that fits a tennis ball, tennis ball, hard rubber ball.  Your challenge is to build a container to hold the marbles.  You will score 1 point for each marble it holds, 1 point for each inch of height of the container, 10 points if the container holds all the marbles when a tennis
ball is rolled down the tube and hits the container and another 10 points if the container holds all the marbles when a rubber ball is rolled down the tube and hits the container.

Challenge 14 - Blind Builder (Submitted by Julia Turlington, Greer, SC)
Blindfold one team member and have the other team members verbally direct him to complete some task, such as duplicating a
structure of legos.  Give points for completion of the task and teamwork!

Challenge 15 - Pet's Paradise (Submitted by Patsy Frederiksen, Dallas, TX)
You are given a large piece of butcher paper and markers.  The team is to draw a creation of a pet they would like to have.  They need to draw in all unique features that their pet would have and then explain why their pet would have these features.

Challenge 16 - Tall or Fall (Submitted by Elaine House, Muskego, WI)
The Background Story: Your team needs to make a display of pingpong balls for the sportgoods dept.
The Challenge: Your must stack the balls as high as you can. The balls must be supported by other balls.  The feather must be placed onto the top of the stack without anyone touching the feather.  You are given 30 pingpong balls, a piece of paper, six mailing labels, four straws, a pair of scissors and a feather.  You have eight minutes to build your stack and be scored.
You will score:

• Balls on the table score zero
• Balls supported by the balls on the table will recieve 2 points.
• Each ball supported by 2 point ball will receive  4  points.
• Scoring continues with each ball receiving double the score of its supporting ball.  In other words, a ball wich is five balls high will recieve 16 pts, and a ball eight balls high will receive 128 pts.
• Balls must be supprted for at least 3 seconds to receve score.  All layers are scored  at the same time.
• Feather placed on top without touch doubles the score of the last layer.

Challenge 18 - In the Nick of Time (Submitted by Julie, Plano)
Given 1 small rubber ball (you can substitute any ball as long as it's small), your challenge is to get everyone to touch the ball in the least amount of time. No more than two people can touch the ball at once.

Challenge 19 - Long and Tall (Submitted by Mary Anderson, Seattle, WA)
Provide the team with several miscellaneous supplies, selecting from this list (or whatever you have or strikes your fancy): like 2 pieces of paper, 5 index cards, a 12" piece of yarn, 20 paper clips, 5 mailing labels, 1 pencil, 10 pieces of spagetti, a 5" piece of duct tape, 15 mini marshmallows and a pair of sissors.  Give the team 5 minutes to work together to build two structures, one that extends as long as it can, one that builds as tall as possible.  You will score 1 point for each inch long, 10 points for each inch tall, 1-15 points for creativity, and 1-15 points for teamwork.

Challenge 20 - The Egg (Submitted by Shayne Horan, Texas)
Challenge: Your task is to make an egg stand on end by using the items provided.
Time: You will have 4 minutes to use your ImagiNation to make the egg stand up.
Set-up: On the table are an egg and some materials that you can use to make the egg stand on end.
Procedure: A mother hen has laid an egg which has unfortunately rolled off the roost and out of the chicken coop. This lonely forgotten egg needs to stand up so that its mother can find it. Before the end of 4 minutes time, your team's job is to use your ImagiNation to creatively solve this egg's dilemma so that it will not "DI."
Materials: 1 egg, 1 rubber band, roll of tape, 1 piece of paper, 4 brads, 2 popsicle sticks, and 1 marker
Scoring:  You will score:
20 points for the egg standing up
1-25 points for teamwork
1-30 points for creative soulution
1-25 points for creative presentation of use of materials

Challenge 21 - Emergency Exit (Submitted by Michelle Endicott, Oregon)
Build a building with an opening and closing door using no adhesives.  You are given spaghetti, sticks, foil, saran wrap, paer clips etc.

Challenge 22 - Fry Tower (Submitted by Karen Avery, Seattle, WA)
When visiting McDonalds, have the kids build a structure out of french fries which can support a Big Mac.

Challenge 23 - Long and Tall (Submitted by Anonymous, Roanoke, VA)
You have 10 minutes to create a complete set of costumes for your favorite fairy tale using duct tape and aluminum foil.

Challenge 24 - Stuck for Ideas (Submitted by Marie, Esko, MN)
Using a variety of food items, some of which stick together, such as gum, gummy bears, fruit leather, etc, create a device that might be used by astronuats in space and describe it's purpose. It must be something other than "to eat".