My design was all wood to make it easy. I laid out about 8 feet (wish I had done 9 feet) of welded wire I had laying around. Mine was a 2x4" weld pattern like in the second video above but you can use hardware cloth or chicken wire whatever you have. Roll a good sized 'inside hoop' I made mine about 18" or more in diameter. Then fasten that with hog wire clips or in my case I fastened it down to a 2x4 with screws and washers to grip the metal. Then pack in the hay/straw and roll up the rest of the way like a pumpkin roll.

I intend to add either a stove pipe over the wooden mounting stake or will split a pvc pipe in half and wrap the wood stake with PVC. Since my wood stake comes up through a square hole in my 2x4 it is pretty easy to lift it off the stake and then take stake out if needed.

It would be interesting to experiment with depth and 'jump height' for the ducklings.

Not getting my hopes up, they say often the ducks need a season to get used to it first.