The Thermodynamic Drinking Bird Age 3-4 little walkers will enjoy taking

little walkers will enjoy taking this sweet elephant for a stroll

sleeping on our 100% cotton sateen crib sheet is a dream

1 tube of glue

Handy storage box

Measures 6 inches x 4 inches

The Thermodynamic Drinking Bird Age 3-4 little walkers will enjoy takingThermodynamic Heat Engine. Wow! Thermodynamics & pressure differentials! Enjoy this classic physics demonstration in a handy duck shape. This thirsty bird perpetually bobs long as it has a glass of water to dunk in. Instructions on box. This is not a toy. Age 14+. Fragile Glass The drinking bird is a heat engine that exploits a temperature difference to convert heat energy to a pressure difference within the device, and performs mechanical work. Like