Amanda's lack of memory doesn't mean she didn't go through trials. With a new prosthetic leg, she had to relearn how to crawl and walk. She received her first prosthetic when she was 3 and has been getting a new one once or twice a year as she continues to grow, each of which cost around $20,000. She got her latest one just four months ago. She also owns a second prosthetic, which she uses for non-running activities.