Want to know how to solve sudoku without using brain but using a simple methodical way or want to make a 5 people bike or you made something and want to share with others and show how they also can make it? then the place to be is http://www.instructables.com
Check some of great ideas like Solve Sudoku (Without even thinking!)
or Inexpensive wall decor that will be easy to put together, fun to do, and take up a lot of space on a wall at
like this you can get lot of ideas when you visit this site.
Iinstructables is the place where you can find step by step collaboration.The ideas can be explored by just clicking on the keywords which scroll continuously on the home page. You can enter into the site and explore where over 3000 great how to do guides are waiting to be explored.
There are groups where you can join and meet your like minded people and see what they are doing. Also you can get a rating for your creativity and comments from fellow users.Groups like electronics,home gift ideas, USB toys etc are there to choose from over 200 such groups.
They have forums where you can post your questions and expect some great answers.
If you want to contribute your work, you need to become a member which is free registration.They have a blog by the people who are responsible for this site where you can get latest updates about the site. Also there are some competitions happen from time to time and if you are lucky enough, you may be the winner!
If you are facinated with this site, you can subscribe to their RSS feeds and you will be upto date with the latest contributions and simple and usefule ideas. A great place to be collaborated and share ideas.(http://www.instructables.com)