My late grandfather used to poke us in the head with a pocket knife and say "bees bees bees". He used also give us coffee and home-brewed beer in our bottles from the age of about 10 months.
Unrelated, he used also come out with statements like "a minute is a very long time" and "nobody can hear you scream if you're lost in a chasm."
When we were ill, the crystals came out. They hoped to undo my scoliosis before the orthopaedic surgeon saw me. Had abscesses treated with funny poultices and homeopathic sweeties. One particular cure involved massaging your own nose and coccyx simultaneously. (For one condition, the school got involved to ensure I got real medical care.)
We had the archangel Michael's sword carved on our front door. We were taught that if we told a ghost to go away three times, they would. I have yet to utilise this information. And we went to Catholic mass for good measure.
Spent many a night in public houses - Dad's a musician. Was reared in a cloud of tobacco smoke. Holidayed in caravans and essentially ran wild on a halting site every summer.
Mainly nice memories. Lots of lovely people around us. I grew up into a very skeptical medical doctor, but I still enjoy all sorts of people. Get out the guitar from time to time, but only enjoy crystals as decoration these days.
Would love to hear others' retrospectively strange experiences.