I saw this in Family Fun maybe as much as a year ago. We were invited to a birthday party and I thought this would be a great gift for a little boy. So Mason and I bought enough stuff to make two!
The board is about 11 in wide and 3 ft long- I bought a board from Home Depot, 11 in wide and 6 ft long and had them cut it for me.
We covered the board with strips of duct tape- they have some really fun patterned ones out there and fun colors- but I just used some that I already had. Mason picked the colors. : ) We were just going to do red and white stripes, but Mason threw a curve and asked for blue for the last stripe. He knows what he wants.
I bought a swim noodle and cut it to fit the length of the sides, and a slit along the length. Slipped it on the board, and hot glued it to the top of the board.
Then, some piping- mine is 3" wide, and 2 1/2 ft long. They were already pre-cut to the length. Put on some end caps and there you go!
Here's Mason pretending he fell off. He kept doing this and asking me to take pictures of it. He kept running over to the camera to look after each picture.