How do I get past the penguins

Hint 1 of 7:

Read the sign they are carrying.

Hint 2 of 7:

You need to give them money.

Hint 3 of 7:

Seen any coins lately.

Hint 4 of 7:

One's on Venus.

Hint 5 of 7:

In the VisiComm booth. Pull the coin return knob.

Hint 6 of 7:

Then open the box. Take the coin.

Hint 7 of 7:

Give that coin to the penguins.