Just so that I don't forget those
These were spread out over three years, also there were numerous others that I can't recall but these were most stunningly observant and scientifically valid statements (valid as in testable by observations not necessarily true or correct)
1 Triangles are stable (while constructing structures out of snap in sketch pens)
2 may be the earth's gravity squeezes the moon as it goes around (on why moon has phases.)
3 may be it's a shadow (same as above)
4 it must be air that makes it stable,demoing how pressure is felt when we move fast in air (while ring was rolling about the floor on why it can balance)
5 we need to push earth back in order to walk forward
6 suddenly stopped playing badminton and just observed the shuttle in motion,
Look baba it always moves like (doing parabolic motion with hands) , like we draw long rainbow.
7 look the water rises faster in this glass because it has smaller diameter.(while filling two different water glasses at dinner table) conversely demonstrating it takes longer time to sip out the water from a glass with larger diameter for it to fall by same height.
Edit 16th May 2018
Arsh discovered how syringes work:
After half an hour playing with syringe with a rubber stuck in front, he discovered the air inside and air outside needs same pressure ("energy " in his tongue) to balance the piston. Blocking the mouth prevents air going inside the syringe which causes air out side to push the piston back in.