My daughter hit something. How do I get the text and voice to stop on my Imac? everything we do comes up in a black box across the bottom and he says everything we do via text as well.

We don't know your iMac version nor you Mac OS (iOS is not a computer OS), but you should be able to go to System Preferences > Universal Access and, on the "Seeing" tab, turn off "VoiceOver:

Note that the key combo command F5 toggles Voiceover on and off.; that's likely what your daughter hit in her explorations. Historically, cats are also very good at invoking some part of Universal Access by walking on keyboards!