**Engaging Kids With Robotic Exoskeletons and Gamification Study** This study involves using a robotic exoskeleton, a special device worn on the legs, to help kids with walking problems. Some kids walk with a "genu recurvatum" (knees bend backward) or "crouch gait" (knees bent too much). The study takes place over 5 rehabilitation visits, lasting up to 2 hours each. The exoskeleton is paired with a fun video game that gives visual feedback to make therapy more engaging. The goal is to make therapy enjoyable and to improve kids' walking abilities over time. **Key Points:** - **Study Duration:** 5 sessions, each up to 2 hours. - **Eligibility:** Kids aged 4-21 with specific walking issues. - **Exclusions:** If a child had a Botox injection during the trial, has uncontrolled seizures, or can't follow directions. Participants will be monitored before and after each session, and results will help improve future therapy tools. This study is a great opportunity for children to enhance their mobility in a fun way.