Thermochromic materials change color due to temperature. Our new and improved thermochromic paper changes color within the temperature range of 31oC (88oF) to 37oC (98oF). Heat-Sensitive Pencils will tell you that "you're getting warmer" as you make your point. Add hot water to the Global Warming Mug and observe Florida and California disappear, as Central America becomes just a chain of islands!

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Climate Change Mug
$12.95 - $64.95
The Ultimate Paper Sample Pack
Heat-Sensitive Periodic Table Cups
Pigments in Fall Leaves
$6.95 - $39.95
Disappearing Dinosaurs Mug
$12.95 - $66.95
Touch and See Square
Global Warming Mug
$12.95 - $64.95
Heat-Sensitive Paper
$5.95 - $189.95
Sunburst Color-Changing Putty
Twilight Color-Changing Putty
Heat-Sensitive Periodic Tables
Liquid Crystal Sample Assortment
Liquid Crystal Sheets (4x4 inch)
Liquid Crystal Sheets (12x12 inch)
Heat-Sensitive Pencils