He wanted to try footgolf...which is golf with a soccer ball. For real. You play on a golf course, with "regular" golfers. You start at the footgolf tees (which are different from the regular golf tees), and kick your ball. Each hole has a par, and the goal is to get your ball into the bigger hole with a flag (different from where the golfers are...)
Here...this video might help:
We ended up losing one ball in the creek (a different time then what was shown in the video). It wasn't that big of deal, because, you know, we have plenty of soccer balls.
If you are keeping track, people in our house can now play golf, disc golf and footgolf. (And yes, disc golf is two words, and footgolf is one word).