Jim Henson's characters, including the Muppets, have inspired merchandise internationally, with Chris Bensch, chief curator of Rochester, New York's The Strong National Museum of Play, reporting "There seems to have been a particular craze for Kermit the Frog in Japan," likely due to the "cuteness appeal." Baby Kermit plush toys became popular in the 1980s after the success of Muppet Babies. In 1991, one year after Jim Henson died, merchandise featuring Kermit and other Muppet characters was being sold at Disney theme parks, causing Henson Associates to file a lawsuit against Disney for copyright infringement. Henson alleged that the "counterfeit merchandise" falsely indicated that the characters belonged to Disney, although the latter company had the right to exercise use of the characters due to an earlier licensing agreement. The Henson Associates highlighted a T-shirt displaying Kermit, the Disney brand, and a copyright symbol. Disney representative Erwin Okun said the lawsuit was "outrageous" and "an unfortunate break with the legacy of a fine relationship with Disney that Jim Henson left behind". Disney later acquired the Muppets, and thusly, clothes, toys and souvenirs depicting Kermit and the Muppets continued to be sold at Disney theme parks and stores.