Replacement Gear and Camshaft for vintage Fisher Price Little People Merry-Go-Round

I got a vintage Fisher Price Little People Merry-Go-Round for my niece, but it was missing a part. There's a little cam shaft and gear that are supposed to make it look like the carny is turning a crank to make the ride spin, and those two parts were missing.

Designed in Fusion 360.

These parts are small, and may not be appropriate for some small children. Gluing them together may help with this somewhat, as it makes it much harder to remove the pieces from the toy, although even as separa