Hinge hunt in Ercall As part of our Design and Technology lessons, we have begun looking at mechanisms. Our first mechanism, is a hinge. As part of our lesson we went for a hinge hunt around school. We searched and found different types of hinges. We then made our own butt hinges using carboard and card. The children did an amazing job! By Miss S Ball Year 4 Teacher View all of Miss S Ball's posts.