Gagosian devoted its whole booth at Frieze Art Fair in London to the artist Carsten Höller’s “Gartenkinder,” which is a actually giant playground. Höller uses his training as a scientist in his work as an artist, concentrating on the nature of human relationships. His New Museum show last year incorporated a merry-go-round and a slide installed through the floor of the gallery. Well, of course this installation looks fun and because it’s a playground, kids LOVE IT. They are allowed to play with giant Scrabble pieces and bouncy balls climb inside the dice and they look pretty cute doing it. This is interactive sculpture but to save $$, you could just install a see-saw inside your loft.