What's your budget and what are the goals?

For my workouts, I have almost everything I need with a squat stand, flat bench, barbell and adjustable dumbbells.

The adjustable dumbbells I originally picked up for my kids but ended up using it for my workouts. I also picked up a curl bar for them.

In also have a stall mat on a couple of layers of plywood.

But you can get do a lot with just a set of adjustable dumbbells (maybe new in the $500 range) and a flat bench ($200?)

Agree free weights or even exercise bands.

I got mine a pulluo bar also but he doesn’t use it much. It goes over the doorframe.

girls or boys?

Get them free weights and a subscription to Peloton. It's 13$ a month and you get to do all the cardio, yoga, barre, strength classes.

Adjustable weight bench.

Yoga Mats.

What exercise equipment do your teens use most? Not talking treadmill/bike, but smaller things. Mine are just getting into working out.