Over a 3-year period, 533 children aged between 4 months and 14 years were patch-tested with a “pediatric” series of haptens. The children were affected with various types of eczema or with psoriasis of the hands (n = 31). In 78 positive children, there were 112 positive test reactions to various allergens. Nickel, cobalt, ethylenediamine, and potassium dichromate were the most frequent sensitizers. Positive reactions were relevant in 52 (67%) of 78 positive children.