I can't make a post on this contest, but I will drop it as a comment.
The answer is PLAY
The first picture shows children playing.
The second picture shows the symbol for playing music.
The third picture shows two men playing guitar.
The fourth picture shows a picture of a play (drama).
Thanks for participating in the 4 Pics One Word Contest, we are planning to reveal the answer when the post pays out. We will get back to you.
Remember to invite 3 friends as it was part of the rules of engagement.
Thank you very much.
I invite @davidmarkgeorge, @imohmitch and @brightoekeh