An R&D project designing, implementing and studying cartography activities for children aged 4-8. Special technological artefacts were designed and developed. A custom solution was found for a G.P.S. device so that it gave a one-meter accuracy. A signal was sent by mobile onto a computer. Special cartography software was developed (new version of map component, agent component) for children observing the G.P.S. carrier's motion synchronously on the screen. The childrens' activity involved two groups, one indoors working with the cartography software, one carrying the G.P.S. around the area to be mapped. To construct the map, they had to negotiate meanings using walkie-talkies. Academic research was carried out on the childrens' learning processes related to concepts of space, orientation and using and placing symbols of objects on a map. The Lab activities took place at the Psychico College Primary.