Do you know what "Tuffet" means?

This morning Jaiden said, "Do you know what 'Tuffet' means?"  Then she whispered in a conspiratorial voice, "It means..."bum."  You know -- 'little miss muffet, sat on her (pause for effect) ....tuffet."    I wasn't quite sure what a "tuffet" was but I was pretty positive it wasn't a bum.  I thought maybe it was a little cushion or pillow.  Actually, according to dictionary.com a "tuffet" is a low stool or footstool. You would think from growing up with the Nursery Rhyme that I would know what a tuffet is. Now I know -- and so does Jaiden.  But I wonder...what exactly is "curds and whey?"