Cornflour + body shampoo (just used two big tablespoon flour and then mix in body shampoo till combined as dough)
This is not as soft as if we were to use baby oil. Well, I actually wanted to create a different textural play for her to!
Abstracted from Child Development Info:
Children learn to abstract, to try out new roles and possible situations, and to experiment with language and emotions with fantasy play. In addition, children develop flexible thinking; learn to create beyond the here and now; stretch their imaginations, use new words and word combinations in a risk-free environment, and use numbers and words to express ideas, concepts, dreams, and histories. In an ever-more technological society, lots of practice with all forms of abstraction – time, place, amount, symbols, words, and ideas – is essential.
Video of the 3.5 yo doing her fantasy play <here>