I helped a professor setup this for a zoom class: https://www.amazon.com/Microphone-Waterproof-Transmitter-Instructor-Smartphone/dp/B07Y9H3XX3/ref=sr_1_1?dchild=1&keywords=KM-G100-1&qid=1598981445&sr=8-1

It was pretty slick and easy to setup, and avoided extra wires. I'm not sure about longevity it.

Also consider how you'll hear the kids on Zoom. You'll want a little set of speakers for that.

Good luck!