September 28, 2026

An all-in-one kit, the box sold by its experiment count, is worth it when you price it by the experiments a child actually finishes. A 100-yuan box claiming 100 experiments holds about 30 that stand on their own, which is 3.3 yuan each against 1 yuan on the sticker, or 4.7 once the 40 yuan of…

Difficulty tracks the reagent list more than the age sticker. A chemistry set puts citric acid at 20 g, copper sulfate and potassium permanganate at 15 g each. A crystal growing set lifts copper sulfate to 50 g and alum to 600 g.[1]