FOXBORO--Dozens of toddlers and preschoolers ran around the Mass Premier Courts Friday night without a care in the world.

Their parents would tell you a different story.

`` I can stand here right now and pick out 10 kids who have congenital heart defects, but if you didn't know, nobody would,'' Mansfield resident Chris Campbell said.

The Grace Alice Campbell Foundation, named for Campbell's 2 1/sub 2 year old daughter, hoped Friday night to raise $5,000 for children and their families affected by a congenital heart defect.

Promoting awareness of the roughly 35 congenital heart defects was another goal. Congenital heart defects are the number one cause of birth-defect deaths during the first year of life. One in every 100 babies born in the United States every year is affected. Each defect is different, Campbell said. Some are treatable with medications. Others require at least one surgery, and in some cases a heart transplant.

Grace Campbell runs around with the left side of her heart undeveloped, said her mother, Brenda. Her oxygen level is about 20 percent lower than normal.

Grace has had two of the three surgeries she needs, and will probably have the third one this fall.

`` She really doesn't have any restrictions,'' Brenda Campbell said. `` Our cardiologist says she'll set her own limitations.''

Mansfield resident Ellie Lea, one of the fundraiser's organizers, has a 20-month-old daughter, Megan, who has a congenital heart defect.

`` She spent the first 10 months on oxygen. She'd get a little blue around her mouth,'' Lea said.

Photos of Grace, Megan and nine other local youngsters with the condition were posted on a wall in the Mass Premier Courts gymnasium.

People could read the children's stories -- `` Stories from the Heart'' -- while getting information about the topic.

`` If ten people get some information out of it, and it helps one person, then it makes the whole night,'' Chris Campbell said.

Jordan-Jackson School students Sarah Kashiski, 9, and Danielle Dousa, 10, sold `` Hearts for Happiness'' : handmade bracelets for $2.50 to $3.50. Across the room, dozens of items were raffled, including Easter chocolates from The Chocolate Store and five tickets for the Providence Bruins hockey game on April 7.

`` The community,'' Ellie Lea said, `` has been really unbelievably generous and supportive.''