La Boutique fantasque, also known as The Magic Toyshop or The Fantastic Toyshop, is a ballet in one act conceived by Léonide Massine, who devised the choreography for a libretto written with the artist André Derain, a pioneer of Fauvism. Derain also designed the décor and costumes for the ballet. Ottorino Respighi wrote the music based on piano pieces by Gioachino Rossini. Its world premiere was at the Alhambra Theatre in London on 5 June 1919, performed by Sergei Diaghilev's Ballets Russes.