tto see the reflection of your finger tip

 small mirror  Clean washing up bowl  Water  Blue tack

 : 1. Fix the mirror to the bowl so the mirror is at a 45 degrease angle  2. Fill the bowl with water the bowl does not have to be fully covered.  3. When the water is settled stick in your finger fairly close to the mirror.  4. Look at the mirror what do you see

 you should see the tip of your finger appearing out of nowhere next to the reflection of your finger. The mirror enables you to see the surface from underneath. 