Yep. It's not too hard. We fooled with this many years ago in an occasional jug band of sorts.
You can have some fun if you pick up a real washtub or a small stock tub - like 15 or 20 gallons, made of galvanized steel. You can get these at farm & garden centers. You take a broomstick or something a little heavier and notch the end to fit the rim on the upended tub. Drill a hole in the center of the bottom of the tub and bolt in a small closed eye. Use strong twine or rope, maybe clothesline - experiment - and tie to the eye; the other end whipped around the end of the broomstick.
The trick with this thing is to stick a brick or plank under one end so the tub is off the ground, just in the front, an inch or two. Then you'll be in business. Plenty loud.
And if you play this thing you really should wear a baseball hat, or at least have a gnarly moustache.