BJJ dummy...

So my problem is i want to practice stuff that i learned in bjj class at home but most times i dont have anyone to practice on... So does anyone know how i could make a "bjj dummy" or buy one thats not to expensive or does anyone know any other way i could practice without a "partner".

I've seen some youtube vids on a homemade dummy. I just don't know if its worth it or not.

yeah im trying to find out how to make a homade one...im searching all over the internet if i find one ill let u know