[Da Vinci Series] Da Vinci Rolling Ball Timer Review

Hello.
If you like engineering, can not you just pass these toys?
So I reviewed it once.
Music
ha Cappella - Jimmy Fontanez/Media Right Productions
• Cha Cappella - Jimmy F...
JJD - Future [NCS Release]
• JJD - Future [NCS Rele...
Greeting the Day with a Smile - Doug Maxwell/Media Right Productions
• Greeting the Day with ...

[@청운충무]

나는 아파트경비인데 현관문열어주는월패드 자동누르는 용도로이거쓰면딱인데?ㅋ 아주좋은발명이야 ~

[@fish9447]

왜 댓이 없지?

[@정찬율-t3i]

나는 왜 저렇게 안 되지?

[@정찬율-t3i]

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