eye
Unspecified
13154_27535_animation4
Boy spins disk between two strings, makes animated image. Image of…
1970s
10304_classroom_experiments
A young man talks about his science experiment. He wears a green plaid…
Unspecified
Boy spins disk between two strings, makes animated image. Image of…
1970s
A young man talks about his science experiment. He wears a green plaid…