The first prototypes for the Sonicare Kids series were developed for Hayco. The highest quality was required for the fully functional prototypes, so that samples close to series production could be exhibited at a trade fair. The development was completed under high time pressure within a few weeks including soldering and assembling. The high-gloss prototypes with overmolded rubber components could hardly be distinguished from series models by the naked eye. Of the two designs, one was adopted into Hayco’ product portfolio.