This is a photo of a drum cradle! Thank you to all of our entrants, and congratulations to our winners: Bob, Diana, and Andrea!
Honorable mention for creative (though incorrect) answers goes to:
Greg who said, "It's clearly a collapsible wheelbarrow!" and
Dan who said, "Why, it's the throne of the Mead King, of course!"
Here is the photo of the full piece of equipment: