R/C boats. First with nitro boats in the late 1970s, then electric boats in the late 1980s. Two summers with the nitro boats, one with the electric boats. In both cases, I just had too much else going on to continue.
https://youtu.be/GjaYOhyqHxU?si=81dEu4kw8QWNLM6r
We raced the boats locally in a lagoon in a town close by, and ran the regionals at Lambs Farm in Libertyville, Il.