Casio Exilim help! ASAP!!!!?

I want to take pictures. And I want to be able to set my camera down, press a on and have it take the picture in 10 seconds, if you know what I'm talking about. You can do it on SONY camera's which I used to have but it broke. I need to be able to do this for the family reunion I am going to on Tuesday. Please help! Thank you.