Please pay attention The color will be different in winter and summer, you will receive the colorful pencils in summer, you can put them under the air conditioner or in refrigerator, then will see them turn to black, and if you will receive the black pencils in the winter, you will see them change their colors if you put them in the hot water. Invite kids' attentionThese color change pencils can fill people's spare time and lessen the boredom; Nice stationery to stimulate the curiosity of boys and girls, bring fun to them, but please keep them away from children under 3 years old. Magic effectThese heat activated color pencils in dull black will turn into other colors under the big difference of the temperature, getting rid of the monotonous look. Interesting gifts These mood pencils with erasers are good gifts to boys and girls on birthday, Easter, Children's Day, back to school and so on, also also eye-catching prizes in school competition .