ऐसे कैसे बना ये भोंपू

[@SumandeviBajpai]

Good activity

[@Abhishek-shukla.]

❤❤❤

[@PHYSICSLOVERSbyCBGupta]

Good

[@rahulchowdhury9922]

Good one sir

[@rabiarabia5990]

Very nice bhaiya👏👏

[@physics573]

Very nice sir.......

[@aqureshi62]

Sir
Thank you so much.

[@AKB-Science]

Always welcome

[@anubhavawasthi686]

Bdhiya bhaiya ji 😊

[@AKB-Science]

आपके ध्वनि कार्यशाला हेतु

[@MukeshKumar-el7hv]

Saandar bhaiya .. we will do that activity in the Apna skool . Thanks for the information Amit bhaiya❤❤

[@AKB-Science]

Most welcome Mukesh bhai

[@aqureshi62]

Sir,
On PVC pipe, cover thik paper pipe and slide, to and fro,
Then pitch of sound will change.

[@AKB-Science]

Yes sir