D measured out the last of the baking soda:
KTB put it in the glass bottle, which held some vinegar:
The vinegar frothed up:
At this point, D realized that the mouth of the bottle was too wide to fit the balloon around, and the experiment was going to be repeated with a narrower-mouthed bottle:
Many hands were required for this delicate operation,because this was the last of the baking soda:
We watched the end result:
The observer observed.
I think The Booda was recording and documenting all this on his laptop, but I am not sure:
He certainly seemed happy with his efforts, though.
The balloon filled up, satisfyingly but not fully, with carbon di oxide gas:
Now I'd like KTB to realize that all the cooking done in the kitchen, that gets the food on the table, is also a series of chemical reactions, starting from the setting of her favourite "thayir" (yogurt)!