Under the blue April skies, 200 guests poured into Artesa Winery Saturday for an evening organized by children, for children.

Directed by teacher Patty Wyman, Silverado Middle School’s leadership class raised more than $20,000 to build two new schools in Latin America.

The project is organized by O Ambassadors, a joint program that funds development across the globe through Oprah Winfrey’s Angel Network and the group Free The Children.

Silverado was selected in October to participate in the program, which connects children in North America with people around the world and helps address issues such as hunger, poverty and education. North American students raise funds for  projects overseas and increase global awareness at their school.

Silverado students chose to continue their focus on Latin America after raising money earlier this year for the Del Oso Reserve — a rainforest in Costa Rica.

For months, students worked to organize the fundraiser, and when Artesa donated use of its facilities last January for the event, the class kicked it into high gear.

Donations came in from all over the county and beyond. The event, said Wyman, cost the class only $537.

“That was for insurance and the permit,” she said, plus $31 to Kinko’s.

“It turned into this unbelievable event,” said Wyman.

Two hundred guests lined the lawns of Artesa for the live and silent auctions, guest hosted by KTVU sportscaster Mark Ibañez.

Glass art tiles created by Silverado students, under the direction of artist Gordon Huether, raised $3,800 alone.

“We thought parents would buy their kids’ tiles, but that’s not always how it turned out,” said Wyman, noting that some parents were outbid by guests with no apparent connection to the school.

“It was amazing,” said Christina Dunbarr, 14. “There were a lot of people and they donated a lot of stuff, and they raised all the prices higher because they know the money was going to a good cause.”

In all, Wyman’s class raised enough money to build two schools — $8,500 to build each school, $1,000 to add a bathroom and another $500 per year to pay a teacher, she said.

Another $3,000 will benefit Habitat for Humanity.

E-mails are still coming with additional donations, said Wyman.

“It’s just so much money that’s going to help a lot,” said Aubrey McGee, 14. “It’s just amazing.”

“What I loved about the whole event was that it was so great that the kids were able to reach out to the community,” said Wyman, “and almost everyone we asked was willing to help us.”

“The focus (in Napa) is always on the wineries and the resorts and the spas and the rest,” she said, “but really every single day in Napa there are countless people, like my students, who are working for the betterment of mankind, for the betterment of the world, and the kids just really latched onto that in a big way.”