Most of our readers are quite familiar with Heathkits, since starting in 1947, the Heath Company sold kits for a wide variety of electronic devices. But the company actually got its start in 1926 with the product shown here, a Heathkit airplane, namely, the Heath Parasol.  About a thousand of the kits were sold in the late 1920s and early 1930s.

The ad here appeared 90 years ago this month in the January 1931 issue of Popular Mechanics.