Recent studies in neuroimagery and cognitive psychology support the view of sensory-motor based knowledge: when processing an object concept, neural systems would re-enact previous experiences with this object. In this experiment, a conceptual switching cost paradigm derived from Pecher, Zeelenberg, and Barsalou (2003, 2004) was used to investigate sensory-motor simulation in children's conceptual processing. Adults and 7-year-old children performed a property verification task involving visual and motor properties of manipulable artifacts. Verification times were compared for target trials preceded by a trial in which the property either involved the same modality or a different one. By 7 years of age, results revealed a modality switching cost with longer verification times in the different modality than in the same modality condition. In addition, the switching effect did not interact with age or property modality type. Results support an embodied view of concepts in both adults and children. (Contains 1 note, 1 table, and 1 figure.)