child's play

go play in the traffic

To go elsewhere and feel free to engage in risky behavior; to get lost.

grandstand play

A successful play or other manoeuvre during a sporting competition in which one or more players shows off unnecessarily in order to entertain or impress the spectators.

hold-up play

A play where an attacker retains possession of the ball, while the teammates can move up the field.

play a part

To be involved in such a way to affect the outcome, to be a contributing factor.

play a role

To have an effect or influence on a situation or outcome; to contribute to something.

play all one's cards

To use all one's resources.

play along

To take part in a charade, deception, or practical joke.

play around

To engage in sexual practices outside of marriage.