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每個孩子都應該玩泥餅、捉蚱蜢、玩水蟲、養蝌蚪、抓青蛙、玩泥龜、采接骨木果、摘野草莓、撿橡子、采栗子、爬樹、涉溪、賞睡蓮、觀察土撥鼠、蝙蝠、蜜蜂、蝴蝶，養各種小動物，在干草場玩耍，撿松果，滾石頭，玩沙子，抓蛇，采越橘和胡蜂窩；任何被剝奪了這些樂趣的孩子，都被剝奪了教育中最美好的部分。

The most credible empirical research often comes from studies that have a clear and transparent design, where the assumptions are laid out for everyone to see.

The existence of a legal system depends on the acceptance of secondary rules by officials.