I found this recipe on this website:
and thought it looked fun .............
5 or more 85gm packets of gelatine (jello) - different colours and flavours
Mix each jelly, using 1/4 cup water less than the instructions call for.
Put them in the fridge until they are half set.
Take the first colour and shisk until frothy and pour into a mould or glass to set completely in the fridge.
Add the other colours, one at a time, in the same way.