play the ponies

child's play

Something particularly easy or simple.

dog and pony show

Any presentation or display that is overly contrived or intricate, while lacking real substance.

flog a dead pony

To attempt to get more out of something that cannot give more; to attempt to arouse fresh interest in something that is either hopeless or already settled.

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.

one-trick pony

A person or group noteworthy for only a single achievement, skill, or characteristic.

play a part

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