Diving Sub

Diving Sub

  • $7.90
    Unit price per 
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Intriguing bath toy that introduces the magical world of chemistry - this sub will dive and resurface, dive and resurface, all by itself... Actually you place baking powder in the chamber first, and what happens is the water and baking powder react, giving off carbon dioxide., which lifts the sub to the surface - where it runs out of carbon dioxide, so sinks...