Temperature Changing Christmas Card
Temperature Changing Christmas Card
Regular price
£9.90 GBP
Regular price
£20.00 GBP
Sale price
£9.90 GBP
Unit price
/
per
- The hidden pattern will appear when the temperature exceeds 36°C.
- The greeting card can be reused, and it will gradually return to its original state within about 20 seconds.
- Usage scenarios: The pattern works well with temperature differences generated by devices such as space heaters, hairdryers, lighters, etc.