Bill Nye the Science Guy Visits the White House—Join in the Chat

, a longtime Studio City resident, appeared Tuesday morning in a televised press conference with President Obama and will hold a live chat from the White House at 11 a.m.

After introducing some of the children and saying how impressed he was with their work, Obama introduced Nye, and said, "If we can invite Super Bowl champions to the White House, we can also invite the science fair winners."

Nye will host an online Twitter chat beginning 11 a.m. Pacific Standard Time along with Tom Kalil "the White House Office of Science and Technology guy."

Here’s how it works:

• Starting now, you can ask your questions on Twitter with the hashtag #WHChat. We'll also be using the hashtag #WHScienceFair
• At 2:00 p.m. on Tuesday, February 7, Bill Nye the Science Guy (@TheScienceGuy) and Tom Kalil, Deputy Director for Policy, White House Office of Science and Technology Policy (@WhiteHouseOSTP) will answer your questions live on Twitter.
• Follow the Q&A through the @WHLive Twitter account
• If you miss the live event, the full session will be posted on WhiteHouse.gov and Storify.com/WhiteHouse

The White House Science Fair celebrates the student winners of a broad range of science, technology, engineering and math (STEM) competitions from across the country. At the fair, President Obama will view student projects and speak on the importance of STEM education. The President will also announce key steps that the Administration is taking to help more students excel in math and science, and earn degrees in these subjects. 

More than 100 students from 45 states congregated at the second-ever White House Science Fair.

Also see Nye's photos that he Tweeted in the photo gallery above.

The White House is calling on folks across the country to join the Science Fair virtually! While students at the White House share their latest inventions—from a robotic arm to waste-reducing dissolvable sugar packets—they want to hear about the projects you've worked on.

Talk about your favorite science fair project and share pictures on Twitter with the hashtag #WHScienceFair or through a form on WhiteHouse.gov. 

See Nye and the president on the video above.