I have no ideas.
I had a few ideas but have given them away to grandparents/auntie who had no ideas either. So now I have nothing.
Neither DD has any "major passions" - they are interested in most things a little bit. They both love books, and I have some on order, but I can't just get books. Can I?
Please tell me something your DD loved at age 4 or age 21 months?