This is a pilot randomized controlled trial to assess the feasibility of a home-based Nintendo Wii Fit program (Wii.n.Walk) to improve walking capacity in older adults with a lower limb amputation. Twenty four individuals with a unilateral below-knee or above-knee amputation will be randomly allocated to Wii.n.Walk or control arm. The Wii.n.Walk arm will receive aerobics, weight-shifting, balance games and exercises using the Wii Fit gaming technology. The control arm will receive cognitive computer games and exercises using Wii Big Brain Academy Degree program. Both groups will receive the intervention for 40-minute sessions, 3x/week for 4 weeks. The interventions will be conducted in combinations of in-clinic group (n=3) training and individualized in-home training. Outcome measurements will be completed by a blinded evaluator at baseline, end of treatment, and 3 weeks after the end of treatment.