Color Changing 300 Piece Puzzle
This puzzle changes color with temperature. A cold temperature will turn the puzzle blue, whereas a human's body temperature will turn the puzzle pink. Each piece is printed with heat-sensitive ink, which changes color as you apply different temperatures, from blue to violet to pink.
Please place it in the freezer for five minutes to reset the puzzle to blue.
Puzzle size: 11.8" x 15.7" (30cm x 40cm)