Gross for one! Gross for all! We play with our... Madballs! American Greetings Madballs and Kidrobot have teamed up to present a Madballs Collection featuring Madballs Enamel Pins, Madballs Blind Box Vinyl Mini Series, Madballs Art Figures, Madballs Keychains & Foam Madballs. This series features 16 classic Madballs characters from the popular 1980s toy series. Collect them all and have freaky fun for everyone!