Last year, when Celia Andrews was 9 years old, she decided to sleep outside in the middle of winter. She'd heard about the annual Spectrum Sleep Out, during which Burlington-area business leaders spend a night on Church Street to raise money to support homeless youth, and she wanted to get involved. With her parents' blessing, Celia spent one snowy night in a tent in her Westford backyard — and raised $1,200 for the cause. Inspired by Celia's initiative, the organization is holding its first-ever spectrum student sleep out this month. Anyone can sign up. Just be sure to take Celia's advice: "Use lots of blankets! Also, it's OK to ask people for money, because it's for something really good. You are helping homeless kids!" Celia will be sleeping out again this year, but not alone; she recruited a group of friends to join her.