Spatial ability plays an important role in many fields, especially the physical sciences and engineering. Several studies suggest that spatial ability is improvable through practice with spatial tasks. Improving gifted children's spatial ability has the potential to increase the pool of talented scientists and engineers. The activities of building and programming LEGO robots include many spatial tasks. This presentation provides an overview and the results of an experimental intervention study involving treatment with a curriculum unit based on the FIRST LEGO League competition and a measure of spatial ability as a pre- and post-assessment.