A Jolly Jumper for a lil boi

Hey, this looks like fun.  Somebody posted this to fetlife and I thought it was way way way cool.  He calls it an adult Johnny-jumper.  I remember them as jolly jumpers.  I want one so much.  Now here is a plan that will make one that is similar.

Adult Jolly Jumper

This would be the best ever thing to have.  It's so much fun.

Here is a link to the materials needed to make it.  Maybe Daddy and me can make one this winter!

Let me know if you do it.

Johnny Jumper