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
Using the instructions at http://www.sciencetoymaker.org/boat/index.htm make a Putt Putt boat and sail it on a local lake/pond.
1st half is to make the boat engine (glue needs to set). 2nd half is to sail it - other programme element