FIELD GUIDE FOR CHILD ENTREPRENEURS
Every great stand begins with the ratio. Not a guess, not a "pinch," but the exact proportion that turns sour into sweet, water into gold. This is the covenant between lemon and sugar, written in measurements a child can understand.
The science is simple: sugar dissolves completely in warm water before the acid arrives. Heat the sugar-water to 140°F, stir until the crystals vanish, then cool to room temperature. Only then do you introduce the lemon. Add the acid later, or the sweetness curdles.
How many lemons fill one cup of juice? This is the first calculation a child must make. The average lemon yields 3.5 ounces of juice—roughly 0.44 cups. To get one full cup, you press eight lemons. Eight fruits for one measure. This is the labor of the stand.
Roll each lemon firmly on the counter before cutting. This ruptures the internal sacs and increases yield by 15%. Cut at the equator, not the pole. Use a reamer, not a fork—the teeth crush pulp that clouds the pour.

Here is where play becomes trade. The stand is not a game unless the ledger closes in profit. Let us compute the cost of one pitcher, then the price of one glass.
One pitcher yields eight glasses. Divide $5.40 by 8: each glass costs 67.5¢ to produce. Charge $1.00 per glass, and the profit is 32.5¢. Sell twenty glasses, and the child walks away with $6.50 earned, not given.
This is the lesson: commerce is not magic. It is the sum of inputs, multiplied by courage, divided by fear.
The sign is the first handshake. Hand-lettered on cardboard with markers bought at the dollar store. Three words, maximum. FRESH. COLD. SWEET. Nothing more. The passerby has three seconds. Give them the promise, not the manifesto.
Mount it on two bamboo stakes, driven six inches into the soil. Tie with twine at three points. Wind load testing shows collapse at 12 mph if anchored at fewer than two depths.

When I taught my niece to roll the lemon, she laughed at the math. When she sold her twentieth glass, she understood. This is the lineage: