Pupils at Sewell Park College have been helping to spread the gas safety message in Norwich.
As part of a competition, Grace Barrell and Ella Greenway, both 11, created a poster which will feature on the cover of Norwich City Council's gas safety leaflet.
The leaflet will spread the gas safety message to 16,000 homes, and will also be in the handbook given to people when they first move into a council property.
The competition was run by the city council and its main supplier of gas services, Gasway.
Judging took place at City Hall by council leader Brenda Arthur, director of regeneration and development Jerry Massey and Derrick Rust-Andrews, director of Gasway.
Ms Arthur said: 'The young people very effectively got the vital gas safety message across in this competition.
'It is terrific that so many children were inspired to create such helpful posters.'
The poster blends striking colours with gas safety tips, such as 'try to have a carbon monoxide detector in your home', and 'check your boiler monthly'.
The poster will also be used on the council and Gasway websites and to promote gas events in the future, such as roadshows.
Mr Rust-Andrews said: 'We were impressed by how the pupils took the message on board.
'Many of them would have gone home and talked to parents about gas safety and showed them their posters, so if we save one life with this competition, it'll be worth it.'
Nearly 100 posters were entered. The winners each received �20 WH Smith vouchers. Second place was won by Lisaranne Roxby, who received a �10 WH Smith voucher, and third place by Callum Ellis, who won a �5 WH Smith voucher.
Ms Arthur and Mr Massey were so impressed with two year seven students that they each donated a �5 voucher to Curtis Randall and Abi Hayes.
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