when I click any key my mac book reads it out to me, and my keys have new commands.

So, my niece was over and she slapped several keys on my mac book. Now any key I press read out loud to me. For example: if I click on safari, then my mac reads out "safari", if I type google it reads out "http://google.com." Also, my keys are not responding to the usual commands. For example, the volume key does not respond to volume, instead shows my calendar, etc. Please help!