How can I build the lightest tower next to a platform that holds the most shipment, near the following materials?

I need some tips. The tower has to be just about 75cm tall and 30cm long and 30cm wide. It wants to be as light as possible btu be able to hold deeply of weight. I have some tools (ie. axe, glue gun, scotcch tape, ruler, rag, scissors, etc.) and I also have wood, foam, straws, and fishing line.
Please sustain, what are some strong structures?

Answers:    spaceframe. like the answer above, tubes are strong, but if you make the together structure as a spaceframe it will be strong and light. If you don't know what a spaceframe is, look at how the big cranes on building sites are constructed. a triangle is a very rigid shape, thats how the spaceframe is so strong.
look here for a better explanation and some philosophy,http://en.wikipedia.org/wiki/Spaceframe
one of the strongest and simplest forms for strength is a tube or similar IE a polygon.pentagon.hexagon,dectagon etc.
More Questions...
  • Underground bees PLEASE HELP!?
  • Woodworkers of the World, I have need of your assistance...?
  • What type of pin gun for ??
  • Will ornate rock work as a gravel substitute below a backyard shed?
  • Pulling up a plywood floor?
  • Soldering forks into sculpture-can it be done?