Textbooks primarily use hydrochloric acid and sodium hydroxide as chemicals when teaching "properties of aqueous solutions." These two chemicals are unfamiliar to children and are both dangerous, so their handling is restricted during experiments. In contrast, this lesson plan introduces acids through edible food additives and fruits, allowing for the enjoyment of tasting. Furthermore, the lesson includes opportunities to make predictions and watch experiments with anticipation, fostering continued interest whether the predictions are correct or not. Learning through tasting and a series of thrilling moments. Through numerous experiments, children will learn with understanding. The handouts are not bound. The text will be distributed one sheet at a time. Although there may be a temptation to explain things along the way, avoid preemptively explaining content from later pages. Also, all necessary explanations are included in the text, so the principle is not to provide any additional explanations. Adding extra explanations can sometimes confuse the children. If you feel they haven't understood, have them reread the same section. The plan is designed so that understanding deepens as they progress, even if their initial understanding is shallow. (A5 size, 96 pages)