Year 4 and Year 6 having been investigating whether the shape of a foil boat affects how strong it is. We looked at how gravity and upthrust/buoyancy act upon objects on water and then designed and made a boat out of silver foil, justifying their ideas. To make the test fair all the children had a piece of foil exactly the same size and marbles of the same size were used to test the strength of the boats. The top three boats of the week were made by Rebecca Horton (224 marbles), Ruby Palmer and James Crabb (193 marbles) and Tamjeed Majeed and Daniel Lamptey (167 marbles). The results of the investigation showed that the best boats had the biggest surface area so yes… size does matter!