Edible Magic Potion is one of the coolest crafts for kids because it's edible science!
Potion Making (or Georg's Marvellous Medicine for older children than this). Could adapt this activity as a messy play, sensory activity which also works on ILS skills/fine motor.
george's marvellous medicine activities - Google Search
World Book Day
Pretend Play George's Marvelous Medicine by Roald Dahl Imagination Soup Fun Learning and Play Activities for Kids
George's Marvellous Medicine Messy Playdate (1)
George's Marvellous Medicine- fling medicine at Grandma