Potions

This is the Potion Cupboard.
For this class, I prepared the jars before the party. I added blue food coloring to baking soda and put a small amount in the bottom, then topped it with white baking soda, so that no color was visible.

The Recipe was "Mandrake Restorative Draught".
The "Mandrake Root" is baking soda, the "Phoenix Tears" is vinegar and the "Dandelion Root" is baking soda (dyed yellow). 

The students were asked to add a small amount of "Dandelion Root" to the jar.

The potion became very fizzy.

To that they added water. 

The water dissolved the baking powder and turned the potion green.
One of the prepared jars contained red baking soda, so the potion turned orange (a sign of on especially potent draught). That lucky student earned an extra ten points.
The guests were duly impressed!