There is a scarcity of material under this head, since the occasions to produce such sensations, except for the serious purposes of cooling or warming ourselves, are comparatively rare. Among the few that may safely be called playful, the most prominent is the seeking for strong stimuli for their very intensities’ sake, and because like all powerful excitation, they give us the feeling of “heightened reality” (Lessing). When we court the stinging cold of a winter day, or sit in spring sunshine to get “baked through for once,”[29] we are as much playing, I think, as when watching rippling water, or gazing at heaven’s blue dome.[30] Cool air has the same refreshing effect as a cold bath, while even in a warm bath the pleasantness of the temperature sensation is a satisfaction quite apart from its cleansing and sanitary effects, and most bathers will stretch themselves out to enjoy it for a little while after soap and sponge have done their duty. Among the refinements of the sense of taste, too, the stimulus of heat and cold is conspicuous, as ices and peppermint, hot grog, spices, and spirits witness. 3. _Sensations of Taste_ Brevity of treatment is accorded to this class of sensations as well, though in this case from no lack of data. Kussmaul’s investigations[31] show that, as a rule, the child prefers sweets from its birth, and will reject anything bitter, sour, or salt, although, until the later developed sense of smell is perfected, it is incapable of more delicate taste distinctions.[32] On the whole, we find that with children such distinctions are less varied than among adults, the sweet of candy and the acid of fruits furnishing the staple material for their playful use of the sense. It is true that the pleasure which they derive from these is extreme. I well remember what unheard-of quantities of these viands were consumed at our birthday _fêtes_ at school in Heidelberg, by children from six to nine years of age, not at all because they were hungry, but from mere pleasure in the taste. For we find even in children that enjoyment of eating is no more confined to the satisfaction of hunger than is æsthetic pleasure limited to the contemplation of the beautiful. When Marie G—— was barely three years old she displayed an unmistakable preference for piquant flavours; even those which were evidently disagreeable in themselves she enjoyed, trying them again and again for the sake of the stimulus they afforded—a taste which is much more common among adults than with children.