Make a model putt-putt boat and sail it. The main element is the novel engine that is made from a steel drinks can
Steel drink can, knife, scissors, araldite glue, drinking straws, orange juice carton, night light, glue gun
Using the instructions at http://www.sciencetoymaker.org/boat/index.htm make a Putt Putt boat and sail it on a local lake/pond.
Finish the engine, make the boat and sail it (2nd half of programme)