During its existance, the TV21 magazine lured its readers with free giveaways such as a special agent badge, a press-out Fireball XL5 and a Thunderbirds hat. Another one of those, issued with the 1965 TV21 Summer Extra, was this 'Cosmic Capers Kit', named after the 'Cosmic Capers' humour page. The kit came on a press-out card and consisted of a backing and four sets of strips, each containing head, torso, upper and lower legs of one of four characters: an Aquaphibian and Atlanta Shore from Stingray and Robbie the Robot and Zoonie the Lazoon from Fireball XL5. The left side of the card provided slots where different strips could be fitted. The basic idea was to combine strips from different characters.