MRI is a form of brain imaging that shows us which parts of the brain are most active at any given moment. In our studies, we show children movies involving numbers, letters or faces or have them play computer games about number while in the MRI scanner. This allows us to see whether different types of stimuli are processed in different parts of the brain. Understanding how the brain processes number can lead us to a better understanding of how children learn math and may help in the treatment of math learning disorders. There are no known risks to fMRI scans and children like playing our games and being a part of science!