Yoyo tsuri water balloons in the pool at a neighborhood festival in Japan (@ Hiroyuki Uchiyama/Getty Images)
- Balls like this could prove a very useful addition to your arsenal...""For the biggest water balloon fight in the world!
- These balloons look quite content bobbing about.""But what would happen if they were popped in space?
- In their native country, children like to fish for these colourful spheres and use them as yo-yos.""Where\s the best place to sling your hook?
- Want to get your hands on one of these?""You\ll have to win it first