On the market: Homes with a kid-friendly backyard sell quicker and for more, says Zillow Updated 8:36 AM; Home shoppers are willing to pay extra for a decked-out, outdoor entertaining space, especially if there’s a treehouse, pool or hot tub in the backyard, according to a study by real estate marketplace Zillow released ahead of Mother’s Day. “The hottest kid-friendly home features are attracting buyers and driving quicker home sales and higher prices,” state Zillow analysts. A residential property mentioning a backyard sold 5.2 days faster than expected, followed by listings with a sandbox (4.5 days less than expected) and a home with a playground found a buyer 2.5 days quicker, even in highly competitive markets, the study found.