How can I get off this island?

Hint 1 of 11:

You need to create your own transportation to get off.

Hint 2 of 11:

The balloon bladder will be very important.

Hint 3 of 11:

Why not try to build your own balloon?

Hint 4 of 11:

A good balloon needs something to hold its passengers.

Hint 5 of 11:

And it also needs something to connect these two parts.