I Am So Tired But I Can't Freakin Sleep

You know those swings made for babies ? The ones you put the baby in and turn it on and it just swings the baby for hours . I want one in adult size. It used to he you would wind it up with a crank and it would go tic tic ric tic tic tic...rocking the baby in perfect rhythm. Ahhh that would be so great to help me sleep.