Quick & Cheap experiment
It is also called UV light
Step 1: Things Needed Are 3.
1.Flash light (cell phones flash light also can be used)
2.Transperant and write able TAPE
3. 2 markers (voilet and blue)
Step 2: Final Step
1. Take a piece of tape cover it on flash light ,colour the tape with blue marker
2. Again do the same process on it, of blue marker
3. Take another piece of tape cover it on flash light ,colour the tape with voilet marker
4. Apply the last layer of tape
Step 3: Try It..!!!!!
CHECK YOUR TOILET'S,MATTRESS,
PLEASE LIKE IT????