"children are born true scientists. they spontaneously experiment and experience and reexperience again. they select, combine, and test, seeking to find order in their experiences - "which is the mostest? which is the leastest?" they smell, taste, bite, and touch-test for hardness, softness, springiness, roughness, smoothness, coldness, warmness: the heft, shake, punch, squeeze, push, crush, rub, and try to pull things apart."