Comment by pjacotg
This book [0] has some really nice ideas in it. I have a 6 year old and 2 year old and I'm also on the look out for ways to develop a love of mathematics.
I've found mathematical inspired art projects to be quite effective. For example we'll cut tangram shapes out of card, make tangram animals, stick them on the wall and draw eyes on them and so on. You'll find lots of ideas if you search for math art projects for kids.
[0] https://www.goodreads.com/book/show/12689040-math-from-three...