These are three in-game items – two benches and a barrel – as decorative items, so you can place them around the neighbourhood wherever you want.
2014-04-01: No changes for 0.9.6127
2017-03-20: Updated for 0.9.6112
2017-01-01: Works for me in 0.9.6042
2017-01-01: Updated for 0.9.6034; they removed some fields in houses.csv so this needs updating even though there are no functional changes.
Made with game version 0.9.6008.
They show up in the interface with the other decorations (scarecrows etc); all of them have the same generic deco icon; all require the same resources (4 × wood) but no actual build time.