you don't need to, but if you have the bag of manure you can power up a hover board in a tower with it and it will fly into the mud then you can use it to get around.
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You go to the mill and next to it there is a swamp. There is a ladder like thing in the swamp and the rope is hanging on it.
you have to fill the spaceship up with the green fuel.4838439456846678643497662672+62+854+6782+7825+72+2+72+6271752627175917519792179221792197229129725
The one far back in the muddy swamp.
you have to fill the spaceship up with the green fuel.4838439456846678643497662672+62+854+6782+7825+72+2+72+6271752627175917519792179221792197229129725
On the right side of the mill, next to the mud swamp.
Use the hovercraft (hoverboard) that is in the attic of the mill. (see related question)
it is actually the "rocket" and you need the manure to power it when you power it it will fly out and will be in the swamp
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.
get manure and go inside the wind mill and go up and jump on a rope and go outside and jump on the wind milland keep jumping until the door open and use the manure to power up the machine! THERE!!!!!!!!!!
To the right of the Mill. To cross, use the hovercraft (hover board). (see related question)
the swamp is past the wind mill in the mud