1. World's Smallest Aquarium

1.  World's Smallest Aquarium

 

This is the world's smallest working aquarium, which holds just two tea spoons of water. The miniature wonder, which is made of glass and measures just 30 mm. wide by 24 mm. high and 14 mm. deep, can be held in the palm of your hand. It is so small there is only room for these tiny zebra fish.