In Obi Island, the password for the stone gate is the website URL of Obi Island! Regarding how to get the seven-colored flower in Obi: you need to score over 2500 points in Obi Star Picking. As for the Obi Weekly, you must read it carefully. On the investigation page (P15—16), there's a waterwheel at the top left corner. You enter the mill by clicking on it and then press a purple button. At this point, look out of the window... Okay, return to the treehouse and click on the bucket...