The little boy Cody McCasland had a rare condition called sacral agenesis and was born without any tibia or knee bones and was amputated at 15 months. He's now 8 years old. Team Cody
You can google some more stuff on him
If this little guy can do this, then what's our hang ups? I give this little guy humongous kudos for doing all that he can and not letting his disability hold him back. A lot of grown up wouldn't even attempt to try doing what he does. I wish this guy the best for the rest of his life.