Return to the market place.
Talk to the stinker who is sitting in the sun. Talk to him. He wants sunscreen.
When you've completed the Adventure "Descent", return towards
Wondertown. In the south opens a route to the Windmill.
There is a stinker who's waiting for a package. So play "The Package".
When you finish, you'll go to the Arcade. Cos then it's open.
The first stinker you meet at the Arcade, start talking to. Ask him about the
nice sunny day.
First he will say something about sunscreen but he will not give it to you.
Ask him the other questions.
Then ask him again about the sunscreen. Then he gives you the sunscreen.
Return to the market place.
Talk to the stinker who is sitting in the sun. Talk to him. He wants sunscreen.
So give it him.
He will give you a golden star in return.
Solution by Erwin042