Don’t interrupt.

[Silverobama]

I divided tonight’s English club for kids into two teams and asked each of them to role-play their conversation. When team A was acting, some kid was talking, I said to him:

Don’t interrupt!

Is it natural?

 

[tedmc]

Keep quiet. Don't disturb.

 

[emsr2d2]

I divided the kids at tonight’s English club for kids into two teams and asked each of them to role-play their a conversation. When While team A was acting performing theirs, some another kid was talking. I said to him:

Don’t interrupt!

Is it natural?

It's OK. It's quite abrupt. You might say "Please don't talk while others are performing".

 

[Piscean]

Don't disturb.

That doesn't work without an object.