Created by prolific illustrator Roger Hargreaves in 1971, the Mr. Men books and their ever-growing world of 'Happyland' were a practically instant success. They were quickly joined by the characters of the Little Miss series and the exploits of both stay extremely popular to this day, encouraging kids to read and helping household generations to bond.

In 1988, the role of Mr. Men Little Miss illustrator was taken control of by Adam Hargreaves-- Roger's child and the very same curious young boy who had actually asked what a tickle appeared like. Adam has designed the reverse for all three of The Royal Mint coins celebrating the characters' 50th anniversary.