Phyllis Walter began experiencing what she thought were signs of aging more than 20 years ago when she was in her 50s. Things like forgetting words and some memory loss. >> I would try communicating and I couldn't remember words.>> Now at age 80, Phyllis says her mind is sharper than ever. Click the start button to begin. She credits it to a video game that challenges her brain to work faster.>> It turned my life around. >> It turned your life around. I I found my brain was sharper than it had been when I w ...