Shower melts.....
1 cup corn starch
2 tabs water
5-7 drops essential oil
Place the oil and corn starch in a bowl, mix well the mixture will look like crumbly powder.
Add a few drops of food colouring (optional) into the water mix into powder. Continue to mix until the colours disperse and clumps begin to form. This amount of water will not be enough to for m the paste that you want.
Continue to add a few drops of water at a time mixing well as you do.
Once you have a thick paste transfer the mix into your ice cube trays or moulds. Smooth the mixture out flat.
Freeze for on hour for the mixture to set.
To use, place one melt in the bottom of the shower and turn the water on.
This is the recipe I use and I am not 100% happy with it, (a bit crumbly). There are many different recipes on Pinterest and the Internet.