the hover craft in poptropica is in the top of the mill to open it jump on the spikes
u cant
use the bag of manure
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With manure. Get it from the guy with a cape and spade near the windmill.
Use the fertilizer that the farmer-guy gives you.
there's a guy holding a bag he'll give it to you. (he's by the fence)
you get the manure you rotate the mill counter clock wise then enter and power the hovercraft with the manure
Use the hovercraft (hoverboard) that is in the attic of the mill. (see related question)
you have to ask to guy on the far left the where to windmill is with zits hill give u
When you get the windmill open on astro knights, you go inside and get the (manure-powered) hovercraft.
In Astro Knights Island on Poptropica, the fuel for the hovercraft can be found in the fuel canisters located next to the dock where you first arrive on the island. You need to collect the fuel canister and use it to power the hovercraft to cross the toxic swamp.
To obtain manure for the hovercraft fuel in Poptropica's Astro-Knights Island, go to the farm on the main planet and explore the barn. You will find an item called "Excrement" there which can be used for the hovercraft fuel.