When we visited in Kanchanaburi at 91, I read in LP about the Floating Nun, 70-plus years old, who meditates while floating on her back in a water pool, making Buddha postures....Thais come from all over Thailand to see her float and to receive her blessing which she bestows by whistling on to the top of a devotee's head. When I visited there, it was free. Now a day, it became a tourist trap show, for payment, performed by changing turn of 12 younger Nuns. en.wikipedia.org/wiki/Maechi