A night at the circus is great entertainment, and the sims just love it when Circus Anno comes to town! The performances are great, but it is even more exciting when the circus has "Open day" and your sims can walk around exploring the settlement and animals. They might even try to stand in the center of the menage themselves - and for a moment feel how it is to be one of the artists. Not to mention that it is a colourful and intriguing element in the town, with its bright colours and unusual people.
Send in the clowns!