Study duration will be two weeks per subject and two weeks overall, it will take place at youth summer camp for children with T1D. Main inclusion criteria include age of six to 15 (inclusive) years, clinical diagnosis of T1D for at least six months, at least three months of current use of insulin pump therapy, HbA1c between 6.3 and 10 % (both inclusive), no other chronic medical conditions (beside treated hypothyroidism and celiac disease) and no current medications (other than insulin) (detailed list of inclusion and exclusion criteria list can be found at section 6).