食物科学 · 从可可树到巧克力棒Food science · cacao tree to chocolate bar
巧克力从哪来Where Chocolate Comes From
豆子怎么变成棒棒？为什么会融化？一起做小小美食科学家。How do beans become bars? Why does it melt? Be a little food scientist.
第 1 站Stop 1
巧克力科学卡片Chocolate Science Cards
点翻卡片：可可树、豆子变棒、融化、味道与分享。糖要少吃一点哦。Flip cards: cacao trees, bean to bar, melting, taste & sharing. Go easy on sugar.
第 2 站Stop 2
融化实验Melt Experiment
点「变热」让巧克力融化，点「变凉」让它再变硬。Tap Warm to melt chocolate, Cool to harden again.
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现在是：固体巧克力Now: solid chocolate
热会让固体变软变液体；凉下来又变硬。这是物态变化。Heat softens solids into liquid; cooling hardens them again — a state change.
第 3 站Stop 3
从豆子到巧克力棒Bean to Bar
按正确顺序点步骤：种树→摘豆→烘烤→研磨→成型。Tap steps in order: grow → pick → roast → grind → mold.
第 4 站Stop 4
味道记忆配对Flavor Memory
翻卡片找相同味道符号。记得：巧克力好吃，但不要一次吃太多糖。Match flavor symbols. Chocolate is yummy — just not too much sugar at once.