I built a half-pipe with my 10-year-old son! We designed it in Sketchup, did a material takeoff in Excel, and built it with lumber that got delivered to our house. 4’ high, 8’ wide and 29’ long—-and hours and hours of fun. Teaching things like trig and how to use a chop saw and the difference between different grades of plywood to a boy who’s learning-starved since school closed has been one of the more rewarding things I’ve ever done.
Excellent project. Not as hard as a half pipe, when I was 8 my Dad and I built a lumber bike rack. Classic memory, its still stationed in front of the garage having taken quiet a beating. During the summer every night of mine and my siblings - sometimes drunken - teenage buffoonery for years on end ended with us riding/crashing into each slot.
