How do I get further down still?

Hint 1 of 7:

Go to the other side of the waterfall

Hint 2 of 7:

using the umbrella

Hint 3 of 7:

on the hook.

Hint 4 of 7:

Deflate the pool float

Hint 5 of 7:

using the pump

Hint 6 of 7:

before swinging over to the other side.

Hint 7 of 7:

Then float down