The tunnel also is a nod to the timber clad player tunnel from 17th green at Hollywood GC, NJ (restored by Brian)
Many kids crawl through the tunnel to get to the green, but 17 at Hollywood wasn’t something we were thinking of as inspiration.
We were actually inspired by mini golf courses and tried to implement the idea of a tunnel or a portal on a bigger scale.
We played the other day, and while it does work, we’d like it to work better. May need to tweak the surrounds or grass it a bit differently (there’s synthetic turf at both ends of the pipe to encourage the ball to keep moving)
Great fun!
As you tweak it maybe consider a timber framing the entrance/exit to tie it in?
"Nod" was probably the wrong word/inferenece, it just jumped into my mind that I recalled visiting Hollywood earlier this year, to walk the course, that I loved that quirky feature through the berm and the tunnel reminded me of it in miniature.
What you have both created is (from photos, videos and reports) so special and the Kid's Course is an awesome addition.
Cheers!