3 year old twins fight over this app

My boys LOVE this app, but are hitting the items fast and never counting with the voice. It would be nice to have a feature that would turn off the voice (without muting the ipad) and/or just gray out the items counted with out the numbers on top, so they can count out loud. Over all great app, and well worth the price!

Twinzmama07 about Toddler Counting