how to make science toys on the principle of wheel and axle.
Search here and google "mechanical toys" and you'll get lots of ideas. Ps if a question has fewer than 5 words in the title it takes 48 or more hours to get posted since a human has to look it over. If it has more than 5 words it gets posted almost immediately. Your wrote this over 48 hours ago and you have only one view.
Select as Best AnswerUndo Best Answer