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A very helpful and informative video
Where we cam see more toys designed by you?...thanks
Hello. My son who stopped going to school 3 years ago has just started having interest in physics. Now I have to teach him by myself but I am not good at it. Your video is very helpful. Can I ask where I can find these pulleys?
A very helpful and informative video
Where we cam see more toys designed by you?...thanks
Hello. My son who stopped going to school 3 years ago has just started having interest in physics. Now I have to teach him by myself but I am not good at it. Your video is very helpful.
Can I ask where I can find these pulleys?