The White House Science Fair kicks off today — Earth Day — with the president hosting student winners of 45 competitions in science, technology, engineering and mathematics — otherwise known as the STEM fields.

Bill Nye @thescienceguy & @levarburton welcome you to the #WHScienceFair!

— The White House (@whitehouse) April 22, 2013

Along with the students are celebrity guests, including Planetary Society Executive Director and “Bill Nye the Science Guy” host Bill Nye, actor Kal Penn, New York Giants wide receiver Victor Cruz, Mars Curiosity rover flight director Bobak “Mohawk Guy” Ferdowsi, “Big Bang Theory” co-creator Bill Prady and actor LeVar Burton.

The White House promoted the event via Twitter, taking the opportunity to produce its first short-form, looping video using Vine.

“Welcome to the White House Science Fair,” says Nye in the video.

“Science rules,” says an attendee.

“But you don’t have to take our word for it,” Burton says.

The White House is offering a video feed of interviews and events with the attendees hosted by Burton and Nye. The science fair this year features 100 students who hail from 40 states and coincides with the announcement of new initiatives as part of the President’s Educate to Innovate initiative. These includes a new track for AmeriCorps focused on STEM education, a campaign to encourage more STEM professionals to mentor students from kindergarten through college, new STEM-focused programming on the Discovery Science Channel, and a campaign to encourage young people to become “makers.”

The president is scheduled to deliver remarks at the science fair Monday afternoon, after touring through the 30 project exhibits in the East Garden and State Dining Room. This is the White House’s third science fair.

Read more news and ideas on Innovations:

Of tsunamis and big bangs

Can Silicon Valley reinvent customer services — without the humans?

NASA’s taking 3D printing to the stars