The purpose of the study is to examine glycemic and neuropsychological outcomes in very young children with Type I diabetes who are being started on insulin pumps and to compare their outcomes to children who are not utilizing insulin pumps. We propose to assess 40 children with IDDM under 5 years of age. 10 patients examined will be using multiple daily injections with basal glargine, 10 will be using NPH or Lente and rapid-acting insulin, and 20 will be examined prior to and 12 months after the implementation of insulin pump therapy. These subjects will be recruited and followed because they are currently undergoing treatment for Type 1 diabetes. Children will be recruited based upon the insulin regimen that they and their primary diabetes physician have chosen to utilize clinically. Insulin regimens will not be changed by the study team. Outcome measures will examine: glycemic outcomes (overall control, blood sugar variability), cognitive outcomes, parenting Stress, and changes in diet.