Even though Gustav Ehrenreich was an internationally recognized craftsman in the 1950s and mid-'60s, he found his true calling in life when he designed a springy toy in 1968 and launched Denmark's happy movement. The Hoptimist announced itself with the bright, primary colors that were popular during this time, and was cast from the same plastic as another classic Danish toy, Lego bricks. In 2011, the Hoptimist became the main sponsor of the Danish Hospital Clowns, donating money to the organization for each one sold. The Hoptimist illustrates the Museum's committment to creating a dialogue about design for children, as in MoMA's 2012 exhibition Century of the Child: Growing by Design 1900-2000.