PRIMARY school children have been lobbing marshmallows - in the name of science.
As part of National Science Week, hundreds of children from across West Yorkshire competed in the Crazy Catapult Challenge to find the fastest, wackiest and most accurate catapult in the region.
The team pictured are the Boudicca Bashers from Southdale CE Junior School, Wakefield
The teams' mission: to fling, sling and toss their sweet missiles to destroy a fort wall made of cardboard boxes.
Creative Minds set the mad three month challenge to get kids using their STEM (Science Technology Engineering and Maths) knowledge to create and build a catapult worthy of the competition.
Alex WcWhirter, head of Enterprises at Yorkshire Forward who funded the event, said: "Innovation is key to the region's continued development, and getting young people engaged with STEM subjects is crucial to ensuring we create the innovators of tomorrow.
"What this project does is link innovation and enterprise together in a way that gets children excited about learning outside the traditional classroom environment."
One of the four regional hosts for the challenge was the Tolson Museum in Huddersfield, with local representatives from Gilthwaites First School, Denby Dale and St John's CE School, Golcar.
The museum has taken part in National Science Week for seven years, and this year looked after teams from 14 schools in West Yorkshire, who took their slinging inspiration from Roman soldiers.