Frustrated with cloth nappies, Valerie created the first PADDI prototype. It consisted of a cellulose wadding pad covered with a muslin or gauze outer layer. The initial design was simple but effective, offering a practical alternative to traditional nappies.

Valerie applied for a patent for her disposable nappy system, securing her intellectual property rights. This step was crucial for protecting her invention and attracting potential investors.

Valerie began small-scale production of PADDI, selling them locally to friends, family, and at a local department store, Harrods in London. This phase allowed her to refine the design based on customer feedback and assess market demand.

Valerie entered into a licensing agreement with Robinson & Sons (later known as Smith & Nephew), a large healthcare company. This partnership allowed for mass production and wider distribution of PADDI. Robinson & Sons manufactured and marketed the product under license.

PADDI gained significant popularity and became a widely recognized brand in the UK. It revolutionized childcare by offering a convenient and hygienic alternative to cloth nappies. The brand enjoyed considerable market share.

As other brands entered the disposable nappy market with improved designs and marketing strategies, PADDI's market share eventually declined. Companies like Pampers, using more absorbent materials and superior design, became dominant.