Using epsom salts to fill jam jars, add food colouring and scent, and decorate.
Jam jar per child (smallish size unless you have lots of salt!)
Epsom Salts - Recommend about 5kg for 24 jars
Just add the salt to each child's jar, discuss the effects of the different colours of food colour and mix and match as needed. I would only just a couple of drops to start with and add as necessary. Add scent if wished. I used Rose Water essence but anything is good. You could also add glitter if you wanted. The children can then decorate as they wish.
You could run this activity over a couple of weeks and have jar painting if you have the equipment/space to store.#
Our boys absolutely loved this activity.