Abstract: One embodiment provides a method of treating the skin or body part, comprising contacting the skin or body part with a composition; and contacting the composition and heating and/or cooling the skin or body part with a thermoelectric Peltier device. Another embodiment provides a skin care kit, which comprises a composition suitable for application to the skin; and a thermoelectric Peltier device configured to contact the composition and to heat and/or cool the skin. Other embodiments are also disclosed.