I have big hands,and a lot of hand strength from a lot of years in my field. That doesn't mean I use a lot of pressure, it just means I'm very difficult to dislodge 😜
Probably my favorite go-to spot, I've tickled a lot of very small girls like this or ones that were just narrow through the hips and waist. Wrap my hand fully around so that my thumb rests right on the front of the hip bone, in my fingers, slide into the crease on the other side of them where their butt meets the thigh.
Alternating between pressing the thumb on the front of the hip bone and then clawing the fingers at the back, gentle to moderate pressure, right in the thigh crease almost always produces an electric jump up in the air reaction. Because your hand is wrapped all the way around, the opposite side, whether it's the thumb or the fingers is supporting and preventing them from jumping very far away from it, which magnifies the effect quite a bit.
I've had a lot of success with this one, with a lot of very surprised girls 😆😁😆. Once they knew what they were in for, a bit of verbal teasing while my hands were in place but not actually doing anything yet produces a great ramp up reaction.
'are you ready for the button?'
* Hysterical laughter before I've actually done anything*
👍🏻