Meet Duncan The Drinking Bird, a brilliantly coloured scientific wonder! With bright red, royal blue and emerald green colouring, Duncan makes an attractive colourful ornament that demonstrates the principles of thermodynamics. Simply dip his head in water to make his blue liquid flow, letting him drink over and over again! Duncan will dazzle the kids for hours, and make an interesting conversation starter for when guests visit.

This seemingly simple device uses the principles of thermodynamics to maintain a constant bobbing motion