Swing
Swings are often found on community lots in The Sims 2 and The Sims 3. They seem to be addicting to Sims; they use them all the time, and if someone is on them already then the Sim will push them.
Swings can be bought in the Buy Mode. Several swings placed side-by-side connect to become a swing set.
Using the swings can satisfy a Sims Fun need, and Social when pushed or pushing.