Hi Anna,
Welcome to YT. Congratulations on Miss Molly!
I really like that name. It's cute. Here are a few websites that might assist you:
Alex's Yorkie Care Frequently Asked Questions Yorkie Dictionary YorkieInfoCenter | Dental Care for the Yorkshire Terrier
I was going to add that Kacee loves soccer balls that squeak of course.
She used to love to chew on Merrick's bully sticks, but I don't remember if Petco carries them.