Students on the National Citizen Service scheme ended four weeks of preparation with fundraising events.
A group of 16-year-olds from the Stamford and Bourne area held a fun day at The Shack in Stamford on Friday last week.
The teenagers put on games for young children, organised face painting and loom bands, and held a raffle to raise money for the Evergreen Care Trust.
Lauren Proctor, 16, said: “We want people to have a better opinion of teenagers. We wanted people to feel that not all teenagers fit a certain stereotype.”
The group hoped to raise £200 on the day.
In Bourne, a group of teenagers taking part in the programme held four weeks of activities, including two residential weeks and two weeks delivering a social action project, where they were fundraising for Help for Heroes. The teenagers raised £1,285.
Mentor Steph Wilkinson said: “I feel my team of young people have done a great service to their local community.”