Starter kit idea: one 6–8 foot wooden stake, 20–30 feet of 14–18 AWG copper wire, a mallet

https://www.scribd.com/document/1031631349/Copper-Tape-Wire-or-Rods-Choosing-Materials-for-Electroculture-Gardening-159241

Starter kit idea: one 6–8 foot wooden stake, 20–30 feet of 14–18 AWG copper wire, a mallet, and weatherproof ties; install near tomatoes or squash and observe over a full season with careful notes.