If you are tired of the same old boring wallpaper designs on your wall then you'll find my idea interesting. I suggest creating digital wallpaper. There would be digital paper or some kind of very thin screen on your wall. A small computer box would also be on the wall. You would be able to download any image you wanted to see on your walls. In such a way you could change wallpaper every day.

The idea with that artificial rainbow is fantastic. A rainbow machine has been already created. It uses reclaimed rainwater and sunlight to create rainbow effect. The machine applies jet pumps and custom fountain nozzles to spray water in the air, and then the sunlight shines through to create the rainbow effect.

We've got smart phones, but what about smart credit cards that, like wallet-sized Lilliputians, tie you down when you're about to spend too much? If in your travels, you find yourself overspending on certain things - in my case, Starbucks iced coffee - this new money management tool could be useful. Through a service called inControl, you can tell your bank to decline your credit card at restaurants after, say, $300 in lunches in a month. Ron Lieber of the New York Times reports that...

I suggest using a new method of steel processing which results in an end product that is lighter, stronger, and more environmentally friendly than traditional methods. The process takes only ten seconds, rather than the hours or days of heating in conventional steel plants. The metal is flash heated and then quickly cooled, which alters the microstructure of the steel and results in a product that is 7% stronger and 30% more flexible than traditional steel. And since the...

An entrepreneur from Arizona decided to use polymers to create a product that literally saves human health, thanks to its cooling properties. He suggested sewing polymers inside the material and creating stylish scarves, which can cool in the hot weather. The principle of the cooling scarf is the following: when it becomes wet, polymers absorb moisture and through the natural process of evaporation create a cooling effect in the area of the carotid arteries, vessels of back and...

It would be great if someone invented a holographic TV. There everything you see would be projected creating a feeling as if it was actually there.

My idea is to create a mobile device which can be used by deaf and hearing-impaired people. I suggest creating a tool which would be integrated to any high-end mobile phone with a video camera. The tool would be based on motion detection technology, i.e. it would be possible to identify American Sign Language (ASL) and transmit video images over cell networks in the US.

I want to have a smart fence which can sense the difference between the rustling of leaves or a person skulking around the area. There will be a small low power device to be attached to a fence or other object or just be placed on the ground. It will use seismic sensors to distinguish between different types of movements. An alert will be sent wirelessly to the command center under certain conditions.

The same chemical used as a pigment in breakfast cereals could lead to the creation of LEDs that are grown or printed on the surface of paper. To create the printable diodes, it is necessary to first grew nanometer-sized zinc oxide crystals by coating paper in a polymer, seeding it with a solution containing zinc, and then coating it again with another polymer. The paper is then dipped in a mixture that encourages the zinc to grow into upright hollow rods, with yet another polymer...

My problem is that I'm too lazy to cook for myself... eating in restaurants is expensive and fast food is not tasty and good for health. If you have similar problem then you'll like my idea. I suggest creating a web site where amateur cooks will sell dishes of their preparation. There will be an opportunity to find diet food, different national dishes, etc. The prices will be specified by sellers but they will always be able to feed other people even for free. Buyers will use...