how do you make a simple air device using 8 x 11 1/2 copy paper, straw and small paper clip to float?
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Bernoulli Effects\n\nSee how to demonstrate it here --> http://www.physics.umn.edu/outreach/pforce/Bernoulli.html
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There are various sites that explain how to build a paper blimp, just scale them up, as far as material goes you need an airtight flexible material that isnt subject to uv attack, mylar is the favorite.
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Wow, thats a tuff one. Have you considered cardboard or wire and fabric? How much time do you have because this seems like a time consuming task. You could look on the internet fo ideas that might help you out. It depends on what you want it to look like.
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If it has an air bubble then tie a string around the upper end and whirl it around over your head.  The force should make the bubble rise.
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Tripod for free space with advertising, or 250free. the former will give you 20 Mb with advertising the latter 250Mb with lots of advertising. if you don't have web design software try NVU. Also try coffecup for a freeware FTP program.\n\nThat must be a top answer!\n\nlook at my site and steal ideas, download MP3's etc. leave a message in the guest book.
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Make a box of strong glass or reinforced cardboard. Put the mobile inside it and use a vacuum cleaner to suck the air out of the box. Make it airtight. Thats it.
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you can create numbers and shapes out of cardboard\ncreate cone/hat out of nice colored paper.\nand of course put a string trough with needle
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well i know with simple instructions!\n\nTo measure how much air your lungs can hold by making a spirometer.\nInstructions: Lung Capacity\n1\nWhat You Need\n• 2 or 3 liter plastic bottle\n• Large, deep bowl or plastic dishpan\n• Water\n• Masking tape\n• Measuring cup\n• 30 cm (1 foot) long piece of flexible tubing (aquarium tubing works well)\nTo Do and Observe\n1. Vertically attach a strip of masking tape to the plastic bottle, from the\nbottom to the top of it. Fill the measuring cup with 60ml of water. Pour\nthe water into the bottle. Mark the water level on the tape. Repeat until\nyou've marked to the top of the bottle.\n2. Fill the dishpan about 10cm (4 inches) high with water.\n3. Fill the plastic bottle to the top with water, and hold your fingers over the\nmouth of the bottle so the mouth is completely covered.\n4. Invert the bottle into the pan of water. Make sure you do not remove your\nfingers until the mouth of the bottle is completely submerged. Insert one\nend of the tubing into the mouth of the bottle.\n5. Take a breath and exhale completely into the open end of the tubing.\n6. Measure how much air is now in the bottle (count the marks). To calculate\nyour lung capacity, multiply the number of marks by 60ml. If your pan is not\ntoo full of water, you can repeat without filling the bottle back up.\nWhat's Going On\n• The amount of air you can hold in your lungs is called lung capacity, and\ncan be measured with a spirometer. Blowing air from your lungs into the\nbottle forces a measurable amount of the water out of the bottle, which\nadds to the volume of water in your pan. This method of measuring uses\ndisplacement – you're displacing a volume of water with a volume of air.\nInstructions: Lung Capacity\n• Displacement is often used when something can't be measured directly. What else could you\nmeasure using displacement?\nTips\n• Check for variations in lung capacity in people of different sizes (older students,\nyou). Ask your class to look for a correlation between body size and lung\ncapacity.\n• Have each participant test for a difference between a "normal" breath of air and\nan "expanded" deeper breath.
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The following link is a pdf slide show that gives examples of buoyancy calculations and theory of floating objects.\n\nhttp://www.colorado.edu/physics/phys1010/phys1010_fa05/lectures/class12-09-29.pdf
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I did this a long time ago at a science fair.  You need a small glass tube, like a test tube, but not too big.  Put a weight around the opening so it will float with the open end down.  The tricky part is to adjust the weight in the tube to it just floats.  Another way is to adjust how much water is in the tube when it is floating.  Put it in a plastic bottle with enough water to allow for submerging and surfacing.  (They don't like the work "sink" on submarines.)  To make the tube submerge, squeeze the bottle.  This compresses the air inside the tube.  The air takes up less space, provides less floatation and it submerges.  Release the bottle and the tube rises again.  It was acutally a lot of fun when I did it.
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Easy!\nStir the mixture into water. Sand sinks. Styrofoam floats.\nScoop the Styrofoam off the water surface with a strainer.\nPour off the water.
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Very easy. Get some recycled cardboard and duct tape and shape it into a boat.
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Try a company called Eurocold
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find a convertor and convert them as flash files it will help you have some space
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Open the jump drive folder from My Computer, open the fodler with the files in it you want. Make both windows half size, drag the files into the jumpdrive window
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Lots of variables here. Do you want one that will move with directional intent, or one that just floats?\n\nThe simplest method for making a "hovering" vehicle would be to take the vacuum engine, mount it onto a curved shield, with the curvature facing down. Make sure your shield is a very light material, balsa wood works, i suppose.\n\nIf you know where the vacuum's intake and output valves are, then it's easy. make sure you make a hole for the output, and secure the engine to the top of the shield. Turn on the engine, and watch the contraption float around aimlessly. It's basically how a air hockey table works, except in reverse.\n\nEDIT: one important detail. Are you trying to make a hover car strong enough to hold your weight? Because that would need one hell of an engine.
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WELL YOU CAN MAKE A PRISM OUT OF A CARDBORD AND \nADD 2 LEGS BELOW IT AND IT WILL WORK