Two experiments examined problem solving in 16-month-olds' adaptive locomotion (crossing bridges of varying width with/without handrail). Findings indicated that toddlers attempted wide bridges more than narrow ones. Attempts on narrow bridges depended on handrail presence. Toddlers had longer latencies, examined bridge/handrail more closely, and modified their gait when bridges were narrow or handrails were unavailable. Exploring the bridge/handrail before crossing and devising alternative bridge-crossing strategies related to task success. (Author/KB)