Land Treetop Village comes into play tapped. {T}: Add {G} to your mana pool. {1}{G}: Treetop Village becomes a 3/3 green Ape creature with trample until end of turn. It's still a land. (If it would deal enough combat damage to its blockers to destroy them, you may have it deal the rest of its damage to defending player.)1
Illus. Anthony S. Waters
The animating ability sets the initial characteristics for the land creature. So, while you can use the ability again, it won't have any additional effect if used more than once. [Urza's Legacy FAQ 1999/02/03]
The land is subject to summoning sickness if you didn't control its card since the start of your most recent turn. [Urza's Legacy FAQ 1999/02/03] See Rule G19.39.
It has creature type "Ape" since Tenth Edition and Oracle 2007/07/13. [D'Angelo 2007/07/15]