“The child does not merely observe the world around him. He does not shut himself off from the strange, complicated world around him, but tastes it, touches it,... » 

“The child does not merely observe the world around him. He does not shut himself off from the strange, complicated world around him, but tastes it, touches it, hefts it, bends it, breaks it. To find out how reality works, he works on it.”- John Holt «