@thepromise308 Sand bags are great and inexpensive. Maybe a little hard to get if you can't get out, but some home depots do delivery for a nominal fee, and some do curbside pick up. You just need 3-4 50# bags of sand and a couple rolls of duck tape. Cover each bag with tape, and tape however many you want together stacked up. They call them pills in the military.
You can squat with it in a bear hug (seriously tough, hard to breath), heft it on to your shoulders (takes some practice, much like a powder clean), or even hold like a goblet squat if it isn't too heavy for that.
Weighted carries with sandbags or anything else heavy work the legs. 20-30 seconds of walking is lots of constant tension on the legs, which from what I gather is good for hypertrophy. Walking with 100-150 lb sandbag in a bear hug is a full body workout, and quite humbling the first time you do it.