how can i build a small toy submarine?
89807
1. you need firstly to have a total density equivalent to that of fresh or salt water(for whatever purposed required)\nthen bouyancy will be stable/maintained \nthis will make a suitable start\n2. forge a shape suitable to make the sub hydrodynamic, this will enable the prototype to glige through the water \n3. have fun!
584806
we have them now.  submarines run on nuke power with an onboard reactor.  there are plenty of solar powered devices.  calculators come to mind.
40356
A model elevator.\n\nNo one really knows how they work and they always take it for granted.\n\nHe can use a cardboard box or half gallon milk carton, pencil, scissors, tape,  plastic straws, string and play-doh. Look up elevator in the World Book encyclopedia and build two models.\n\nOne should have the elevator (a small tic tac box) balanced by string over a straw with a play-doh weight.\n\nThe other can be a hydraulic elevator. Use play doh to attach the tic tac box (with a toy person inside) to a straw. punch a hole in the bottomn of thge milk carton (front and back cut out) now push the straw up and down to make the elevator rise and fall.
310889
get some batteries, get some wires, and a very small lightbulb and a socket. So it should look like this:\nBattery(+) ... wire ... paperclip ... lightbulb ... wire ... (-)Battery
537936
Use a shoe box.  Tape on some wheels and axles.  Put the balloons inside the box with the base of the balloons taped so all the air will go out the back.  When the air is released it will form a primitive rocket, propelling the box-car across the floor.\n\nI can't say this isn't rocket science, because technically, it is.
1086432
here check this out.  http://www.playcornhole.org/  i used the specs in there and built my own set.  it was very easy and cheap!  also if you know how to sew, just make your own beanbags.  i used navy beans inside the bags.  have fun!
827380
If you're looking for a little toy, the Radio Shack catalog should have all you need.  I think Frye's Electronics or Norvac might have some good stuff too.
603474
put the miniature in a boat (hehe)
903289
u may built remote controlled toy. but as for the robots that is a tougher job. u may browse this site  http://www.robotics.com/robots.html
1043917
Go to a store like Michaels (or other art/craft) and take a look around, it might help for ideas.  You can actually buy a kit to make models now too.\n\nstyrofoam balls and toothpicks  (ala http://www.miniscience.com/projects/DNAmodel/)\nthere are other puffy like decorative clothing balls\n\nThese are some fun ones http://www.lake-mills.k12.ia.us/hs/sci/b-e1.html\n\nCandy would always work, but I think it would be harder to make it stay together and than transport to school.  Unless you could do like a 2D representation.
618003
You're going to need containers to move stuff around in which fit closely to the tubes, the tubes themselves, and then an air compressor or vacuum pump to blow them around.\n\nThe link below is for a company which will build it for you. I suspect that not many people build these themselves.\n\nGood luck!
231016
Try www.miniscience.com  The website also gives you kits to buy.  Try www.scienceproject.com
142451
Since this is a school project, your teacher probably wants to you to learn more than just how to build one.  \n\nLearn to use the library.  Learn to use internet search engines.  Learn to spell what you want to build.  Learn to be self reliant.
961363
You can make one on Amazon.com - they have more than books, they also list toys and electronics.\n\nOR you can create your own website for free at tripod.com . They have templates to help you.
427880
I'm not absolutely certain what you are asking, but assuming you want to make toys and furniture I will offer the following suggestions.\n\n1.  Go to The Public Broadcasting System's web site.  A man named Norm Abram (spelling uncertain) has a show called The New Yankee Workshop.  If you can link to his web site he offers plans for every project he does on the show.  He is very entertaining and informative.\n\n2.  Do It Yourself (DIY) is a cable network.  They have a web site that offers a similar service.\n\n3.  Go to your local home improvement store (Lowes, Home Depot, or similar) and go through the magazine racks.  There are dozens of magazines with projects from the simple to the ornate.
898309
The only thing I can think of is to adapt existing models to suit your needs.Try buying Lego men,preferably from a junk or charity shop or pinch them from neighbouring kids.Don't try to make them look real remember they're just representations of the real thing not a model,more of a Cartoon.
296130
This link contains a step by step guide to building your own subwoofer. Hope it helps..\n\n\nhttp://homepage.ntlworld.com/nigel.gough/sub.htm