"Quero jogar"
This literally translates to "I want to play".
Here's how you can adapt this to different situations:
* "Você quer jogar?" - "Do you want to play?"
* "Eles querem jogar." - "They want to play."
* "Quero jogar futebol." - "I want to play soccer."
* "Quero jogar videogame." - "I want to play video game."
The verb "jogar" can be used for different types of play, so you can replace it with the specific activity you want to do.