Ratio Recipe Mixer

What your child will figure out

• Predict the missing partner amount in a 2:3 mixture before pouring it.
• Scale both quantities by one common factor and connect equivalent ratios to an unchanged mixture.
• Use an off-ratio color and taste result to explain why adding the same amount is not the same as multiplying by the same factor.
• Transfer the scaling rule to a novel 3:5 recipe and a larger batch.

The levels

1. The house recipe

   Complete one 2:3 mixture by predicting the fizz partner before pouring.

2. Triple the batch

   Scale 2:3 to 6:9 while keeping the mixture unchanged.

3. Spot the mistake

   Observe why 2:3 changed to 6:7 is off-ratio, then restore 6:9.

4. Festival transfer

   Transfer same-factor scaling to a novel 3:5 recipe and predict 12:20.