Thanks! I'm not yet very familiar with the forum, so I appreciate the advice, and apologize for posting in the wrong spot.. I saw "redstone" but didn't see the command block part of the description.
The commands are indeed for command blocks that make minecarts fly, and i thought i could do the same for riding a horse. This is one of the 8 blocks for climbing flight. I am trying to get my son interested in programming, and commands seemed like a good way to do it.