you have to get the giant his egg. the giant is at the roof top when you clime the vine. he wants his egg so you go to early poptropica in the well and find a glow stick. then go to main street in the sewer and get the egg. give the egg to the gaint. he will let you pass through to the right and you will find the hover craft! ( i have one)
u cant
use the bag of manure
the hover craft in poptropica is in the top of the mill to open it jump on the spikes
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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
From the museum in Mythology island.
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.