วีดีโอ

Nice guru❤❤❤

Mashallah imran bhai good may God help you support you.

Nice sir ji

Nice sir 😊❤

Nice sir❤❤❤

Nice sir 🎉🎉

Hello sir i am khansa usmàni from class 7th

😊 bawal h sir

In riaz convent school

Nice sir i am student of class 7th Umaima firoz

Wah 🎉🎉🎉🎉 Bhai

Nice sir❤❤❤

Oooooh 😮😮

Hello sir I am sana khtoon

Hello sir I am khansa usmani ❤

Good bhaiya ❤❤❤❤❤❤

❤❤❤❤❤❤❤❤❤

❤❤

❤❤❤❤❤

अति सुन्दर अति उत्तम मेरे प्यारे भाई

👍👍👍

👍👍👍

Nice▄︻̷̿┻̿═━一

❤❤❤❤❤❤opop

Amazing❤

❤op

😊❤

Excellent

💜💜💜

Good bhai

Congratulations bhai

🎉🎉

🧪🧪🧪

Sir ji Uses of safety instruments 👍

Keep it up.... Good knowledge

Excellent sir From RCS

Woooooooooooo

Cool experiment 😯

Nice sir 👌👌

I am your class student sir class 6

Nice😅

From RCSSS😊

Keep it up❤

❤😮😮😮😮❤

Amazing🧐

😃🤗✨

👍👍👍👍👍👍👍👍👍👍❤❤❤❤❤❤❤😯😯😯😯😯😯

Wow😊

Can you plz tell us which Gas is release from tube??