She said they were just days away from a prototype commercial product.

HopeLab intends to prototype products based on ideas from the competition and scientifically test them to measure their effectiveness in increasing physical activity among children 11-14.

Engineers often conduct field tests of prototype products to validate earlier laboratory tests and to obtain broader feedback.

Concept development - to create a prototype product or pilot service.

The original prototype product went viral in the online community, with TechCrunch touting it as an "uncrushable music device".

The prototype product was built from scrap sailcloth by Friedman during high school.

This programme, aimed at ages 12-15, revolves around students designing, planning, building and promoting a model for a prototype product.

Testing of prototype products with university, national laboratory and commercial customers is expected to begin by the end of the year.

Neither company would say exactly what work will be done under the agreement, but they said that they would present a prototype product in two or three years.

The samples are going to a variety of companies planning to develop prototype products.