Using a yo-yo could be one. You could have a yelling or yodeling contest outside. A yacht race might be another.
Yakuza. Yourself Fitness
It is an indoor game, but can play outdoor when there is no any strong wind.
outdoor
Outdoor
It is an indoor game, but can play outdoor when there is no any strong wind.
Outdoor Games For Young Kids : Amazon has this cool outside game for children - nannuballoons.com
Press and hold a,b, x and y simultaneously while the game is starting up and that's how to start a new game.
A bright and cheerful word starting with Y is yellow; a very important word starting with Y is you.
swimming is an outsoor game
yummy
a action verb starting with the letter Y could be yell.
Oh, dude, the longest word starting with the letter Y is "yttrium." It's like 7 letters long, so I hope you have the energy to say it all in one breath. But hey, at least now you can impress your friends at your next Scrabble game with your knowledge of obscure Y words.