After you have returned all the items to their own times, all the places on the time device will be GREEN. Use the LAB setting to return to the present, and the Future device to bring you to the restored future time.
To get to your Sky Home, go right (and swim) until you reach the air tube. Go up to the monorail and get aboard. Use the monorail exhaust to lift you out of the car and onto the other monorail car. When you reach the lift platform, take it up to the roof home. That is where you get your Island Medallion.
On your first visit using the future machine, you get the time device from your future self, so that you can restore the items that are tangled in time. When you finish and get the Island Medallion, you still have the device. Set it to "Lab" and go back to Professor Pendulum's lab.
you find your self in the future(seconed time)
Complete all the challenges on Time Tangled Island. Complete all the challenges on Time Tangled Island.
In Time Tangled island, go to Pendulum's Lab. Inside he will tell you what to do. To turn on the machine, go to the bottom of the lab and push the plug.
Use the Lab setting on the time device, just as you did to get to the restored future.
When you return an item on Time Tangled Island, the time device shows "green" for that time (there may still be objects to come from there). When all times are green, travel to the Lab (12 o'clock. the present). Use the Future Machine to travel to the restored future and get you Island Medallion.
After the Future Machine's plug is pushed in, you click to enter it and travel to the future.
Go to Pendulum's Lab on Main Street on Time Tangled Island. They will send you to the future to discover your challenge. Plug in the big plug below the machine to start the quest.
you have to find things and restore all the peoples problems.
The quest "Save the Future" was released as "Time Tangled Island". (see the related question)
You go into the future and talk the the future you, and she/he will give you the medal.
you go back to the LAB to go to the future.