First class had lots of fun constructing 3D shapes from marshmallows and cocktail sticks. They created a cube, a triangular-based pyramid and a square-based pyramid in pairs. They then tested the strength of each of the 3D shapes by pressing down on them. They discovered the cube to be the weakest of the three shapes. Each pair made their own adaptations to their cube with the aim of strengthening it! The girls found that triangular shapes worked best!