Color memory toy

A color memory toy, comprising:

• a toy body having an outer surface;
• and
• a quasi-reversible thermochromic coloring material applied to said surface and having a temperature hysteresis characteristic for changing between a first and second colored state, wherein said material changes from said first colored state to said second colored state completely at a upper temperature above a first temperature when said material is heated, maintains a present one of said first and second colored states within a two-color holding temperature range between said first temprature and a second temperature, and changes from said second colored state to said first colored state completely at a lower temperature below said second temperature when said material is cooled, wherein said two-color holding temperature range is within a range of ordinary temperature.