I want to start a collection of something for my granddaughter that will be born soon. I have hot wheels for a my grandson.?

Go to the toy store and see what she likes

Hello Reba,

I propose a collection of cute plushies online, take a look on https://giftitworld.com/

Maybe a dollhouse?

Not sure if that is out of style now, but my niece was into the one I built for my Mother like four years ago.

Fun to build, and buying stuff for it takes time (If it's good) "not from Hobby Lobby".

Or, if you got a Dremel and wanna take it a bit more personal.

Used to build model cars growing up, cost total in the 90s about $60-$70 to complete.

Even with all my supplies.

Go to the toy store and see what she likes

Save your money and give it to her when she's older and actually needs it, and will appreciate it. Your time and attention are better than a bunch of toys. 

memories of family.pictures from grandparent.great-granparents,great great-grandparents and beyond.

Microscope slides... but her parents will blame you for her lifelong glasses.