TED 2009 happened earlier this month, and the videos of the presentation are beginning to be posted on TED.com. I’ve written about TED before, but for those of you who are new or don’t remember, TED is a convention that takes place once a year, and gathers the brightest minds on earth to come together and share ideas. In short, it is an amazing event. I’ve never been to the event (it’s invitation only, and thousands of dollars to get into), but they post the presentations online so that everyone can view them for free.

My favorite presentation so far this year is from David Merrill, a grad student at MIT. He has created toy blocks that are nothing short of amazing. Equipped with video screens, the blocks can literally do math, play music, and create interactive television. Check out the video below.