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How do I finish the entire island of Astro Knights on Poptropica? - poptropica car

I have this IDEM on this island to date:
Gold coin
Rope
Bag of manure
cosmic symble page
Contact
Museum Brochure
Life Mordred

Well, what should I do? I have a gate between the batteries, but hey told me that this key.

I was in the top of the windmill thing. I click on a little car looked at me and said that it needs energy.

Please help me on the last star I've IDEM Knight! and the places they were!

no answer stupid!