Robo Fish
© 2012 Zuru Toys
About the size of a bass lure, these robotic fish were developed in New Zealand. They are powered by two button-cell batteries (included) and cost $10 each. The rubber tails can be pulled off and used on different fish. The tail motion is randomized, which gives a lifelike swimming motion to the fish. One set of batteries gives about two hours of continual swimming time; an extra set of batteries is included in the package. See the preview at http://youtu.be/65-BnFDuJ8k. See also Hexbug Aquabot by Innovation First.
$9.99, Smart Toy
Teaches: a robotic toy for water play