A kind of water balloon on a string. You win them at Japanese festivals by participating in [[yo-yo fishing]], similar to how you get [[bagged fish]] from [[goldfish scooping]].

h4. See also

* [[yo-yo]]
* [[toy]]
* [[balloon]]

h4. Links

* Blog on Japanese water balloons: http://pingmag.jp/2008/07/03/water-balloon/ 
水風船 水ヨーヨー ヨーヨー風船