It's a sunny Sunday morning in Miami Beach and the entire Kron family is getting ready for their brunch guests to arrive. Daniel helps daughter Isadora, 4, slice mangos and strawberries. His wife, Geane Brito, and 2-year-old son, Magnus, set out chalk on the play table.

As friends arrive, adults gather in the dining area while children play nearby at a teepee set up in the living room, nibble on sliced fruit at the child-size table, and roam outside to paint at the artist's easels.

For Daniel and Geane, this easy blending of children and adults isn't just about entertaining, it's a way of life. "It's important to us to do things together and to include our children as much as we can," says Daniel. "That's what our house and our family is all about. Kids should be able to enjoy all the rooms of the house, not just have a playroom, and the rest of the house be off-limits."

They make this theory work by furnishing the spaces with items - for children and adults - that are useful, beautiful, and modern. "We're selective about what we buy," says Geane. "We like simple furnishings that are safe for the kids, whether that's an adult's chair or a kid's table. And when it comes to toys, we love ones that will spark their imagination."

Living in a loft before they had kids convinced the couple to blend the openness of loft living with the space and yard that a home typically provides. "It's a single-story house and it has an open floor plan with large sun-filled rooms," says Daniel. "The kids love playing in the backyard."

The home, built in 1949, was renovated with low-maintenance family living in mind. Daniel and Geane installed fiber cement panels to create a durable yet attractive floor throughout the house. White walls contribute to the home's spaciousness, while a freshened kitchen with glass mosaic tile and blue cabinets add color. Outside, a hedge around the yard provides privacy and defines a space for children to play freely. Recently planted palms shade the area, and an enlarged patio accommodates outdoor dining and kids.

Within this setting, Daniel and Geane have filled the house with classic modern furniture that mixes well with an assortment of children's furnishings and toys. In the living room, for example, three modern white chairs and a classic coffee table create a comfortable conversation area next to the canvas teepee, their complementary colors and simple design blending easily. Two tables - one sized for adults, one for kids - function equally well for meals and playtime. Vintage plastic chairs make cleaning up easy. The effect is one that encourages hanging out together as a family, snuggling down into chairs to read, gathering for family dinners, even riding bikes across the durable floors.

Finding well-designed furnishings for youngsters, however, required extensive searching. Daniel and Geane looked for modern baby products and eventually found a wide range of goods that suited their tastes. "We realized there must be other parents out there just like us, and that perhaps this was a business opportunity," says Daniel. "We decided to create a modern design store for kids." Their shop, Genius Jones, opened shortly after the birth of their son, Magnus, and was such a fast success that they've opened a second location.

Daniel and Geane's shop embraces the philosophy that they practice so eloquently at home: fuss-free children's furnishings and toys that look completely at home in the living room. "We believe in keeping things simple: If you have surfaces that are safe for kids to play on and rooms that are easy to clean, then you don't have to fuss so much," says Daniel. "Our home is a constantly evolving experiment in modern living with kids, which for us is a perfect fit."