One night during the routine 'su-su' session:
We have a mixie inside
When we eat the food goes into the mixie and goes round and round and then we have 'motion'
When we drink water there is a yellow mug inside that pours the water into the mixie and we have 'yellow su-su'
When we drink lotsa water there is another mug which pours water into the mixie and we have 'white su-su'
And a wee bitta maths in science to make things more interesting
Su-su is equal to one
Motion is equal to five...no not the usual two
Hear all ye docs...this is Achu's Digestive Theory
Update : When Achu had a tummy ache
As we grow taller the mugs we have increase in number....So Amma has more mugs than Achu ...Each mug has one color.... Now all the colors are in the mixie that's why Achu's having a tummy ache