Hi here is Masayo.
We made Jasmin infused oil in my son's Waldorf Steiner School.
They are just under 4 yo but it is easy to be made with little hands!
We pick fresh Jasmin flowers from back yard and put them in Jojoba oil because of Jojoba oil is very stable oil(I mean is not easy to oxidation)
and soak them 2-3days
(We need to make sure flowers are always under jojoba oil otherwise it gets mold)
My recommend way is changing flowers to new one every morning.
You can keep gorgeous sweet Jasmin smell in oil.
We are using as a perfume now!