I have made my 6.2-year-old kid aware of the experiment on delayed gratification (+ video) and its results. It seems to have worked. Now we write what she wants to buy and associate possible (days) delay to it. Also delaying many other things (say, watching a video by few minutes) which she is agreeing to. In general, I find her more disciplined and more free from pangs, otherwise.
Here are some variants I have tried:
Asking to write 2 words: "gradual, planning" multiple times after explaining the context with examples (say for gradual: "Did you run immediately after being born?" "Ans: No" "First turned, crawled, walking with support ... then running". The idea is to let them contemplate on antonyms for sudden / unplanned stuff using a variety of ways: Asking to come up with different sentences using these words).
I have bought Mi Band (basic and 'Tools & Mi Band' app) and configured to vibrate every 10 minutes. For 10 minutes study and then for 10 minutes playing... There is fun with the band. Asking to sit quietly without any movements for 2 minutes with a timer (mobile screen). If there is a movement then again for 2 minutes.
Many more variety of ways we can definitely do and this is what I was expecting. All these things we can do only after connecting. I would request to read "My Heart I Give to Children" by Sukhomlynsky for good inspiration.
This makes me think there must have been similar interesting experiments done in the past, the results of which we can make use of.
Are there any more such results (in variety)? Do you have any powerful (tested) ideas which are orthogonal in variety?