Bubbles, originally titled A Child's World, is an 1886 painting by Sir John Everett Millais that became famous when it was used over many generations in advertisements for Pears soap.

It was modelled by his five-year-old grandson William Milbourne James and was based on 17th-century Dutch precursors in the tradition of vanitas imagery, which commented upon the transience of life.

Millais's permission was sought in order to alter the picture by the addition of a bar of Pears Soap, so that it could be used for the purposes of advertising.

At the time Millais was one of the most popular artists in Britain, and he was initially apprehensive at the prospect of his work and his grandson being the subject of commercial exploitation.

[2] Following the success of this advertisement Millais was attacked in print by the novelist Marie Corelli who accused him in her novel The Sorrows of Satan of prostituting his talent to sell soap.