Floating Colour Timer
- A captivating visual sensory aid.
- Turn the tube upside down and watch the liquid bubbles spiral down to the bottom of the tube.
- Approximately 15 cm in height.
- The surrounding temperature should be between 050 ° C.
- Dimension: 135*50*30mm.
- If contact with oil occurs, wash with soap water.
- Keep-out of direct sunlight.
- Package Including: 1 x Oil hourglass.