Ask the Unicorn Button Sound Birthday Card A completely new type of birthday card with a big button on the front. How to use your unicorn button: Advice from this mythical unicorn is legendary and life changing. Turn the button on, press down, and ask this magical creature anything your heart desires. Front wording: Ask the unicorn button. Inside wording: Have an unbelievably magical birthday! Card measures approximately 13cm x 15cm. Supplied with a white envelope.