Children's invention ideas made real
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Super fast tennis ball

Kai Age 10

Sunderland, UK

This idea has been made real

Carl has an interest in a broad range of design areas and has worked for a number of years teaching on various Animation and Design programmes at the University of Sunderland.

Magnificent maker3 made real

An invention by Kai Rowntree, age 10, made into prototype form by Carl Gregg at Fab lab sunderland.

“This is a tennis ball that you can adjust the power and make it fast and strong” Kai Rowntree

The young inventor met with the maker Carl Gregg. Carl asked Kai further questions about his design, then started work making a model. Turn the dial to select speed, press in and turn again to select power. Play a game of tennis at your preferred speed. Super fast or slow.

“I thought this was such a fun idea and really captured the essence of a child’s invention. The idea is simple: put controls onto a ball that can set power and speed of a ball in flight. What a great thing to have! Unfortunately, we can’t control gravity or build in mini engines into the ball so it was agreed that this would be a concept model only. The electronics are based on Arduino, which is a fabulous system for anyone interested in getting started with micro controllers.” Carl Gregg