Children will be testing out hand-held global positioning system devices on a housing estate in central London.
Westminster could be Britain's first wireless city
It is part of Westminster City Council's aim to become completely wireless within the next few years.
Children will be able to try out GPS drawing, tracing the shapes of cats, dogs and elephants on a map, simply by walking around with one of the devices.
Saturday's event is the first of many workshops aimed at introducing children to GPS and wireless technology.
Eventually small "receivers" placed on buildings will allow lap-top owners to use the internet from any park bench.
Among ideas is putting tiny remote sound monitors outside the houses of noisy neighbours.
A Westminster Council spokesman said the technology would soon be a major part of every London child's lives, as councils and emergency services found new uses for it.
On Saturday, children will also get a tour of Westminster's CCTV control room below Piccadilly Circus, as well as using GPS technology and getting a lesson on its implications from an expert.
There will also be a look at Westminster's new hi-tech Street Management Centre which tracks more than 100 vehicles, like dustcarts, on huge electronic maps.