For a holiday type activity, the project was to build a vehicle
to go by wind power alone. The materials this time were a piece of
card paper and LEGO Znaps - a short lived LEGO line. The extra transportation at the SENSORSCITY was a Duplo train.
In most cases adding a sail made the car go with fewer puffs. With large wheel, blowing on the wheels worked.
The usual LEGO work rules of keep all pieces in the model or
in the box were suspended for these materials. The mess was kept
to one table. The pick up was not too bad.