A 10-year-old Lancashire girl and a 14-year-old boy from Herts have been crowned the Royal Institution of Great Britain's Young Scientists of the Year.
Thea Hesketh from Scorton and team-mate Harvey Rising from Borehamwood beat off 20 finalists to the national title.
Each pair had to design, build and test a 'high velocity eggsporter', a vehicle that could carry an egg at high speed and prevent it from breaking on impact.
Thea said using straws aided them to victory.
Thea, who goes to Scorton Primary School, explained the secret of their success: "We used straws on the floor of our model car to reinforce it and make it stronger."
Trip to Paris
The winning duo, who were selected as finalists from 2,500 youngsters who visited the L'Oreal Young Scientist Centre at the Royal Institution, were teamed up at random by the Institution.
The winning prize for the competition is an all-expenses paid trip to visit the research and development laboratories in Paris.
Thea said she was excited by the prospect: "I like finding things out and investigations and activities."
Thea's mother Helen, who teaches at Scorton Primary School, said she is not only good at science but is also a budding chef.
Mrs Hesketh said: "She enjoys finding answers to things and has a creative approach to science."