At The Young Einstein Club this week we were investigating Raft Design. The pupils were given identical sheets of graph paper, and without cutting the paper were asked to investigate which design of raft was capable of supporting the largest load. We tested rafts with large bases and small sides and those with small bases and high sides. The general agreement was that if the raft is to support a large load it should have a wide base and low sides. Now, where have we seen that before?……..