This is just a simple dog toy set that I thought would make a good introduction to a birthday party-themed storytime. I would simply talk about the items with the kids instead of making up a rhyme or song to go with them.
So for example, pull out the hat first and say "Oh, a hat. What might you celebrate wearing a hat like this," etc.
Prop Source: Midlee Birthday Present Find a Toy Dog Toy
I do want to acknowledge that not all people celebrate birthdays so that is something to be aware of and sensitive to as you plan programs in a public library but I did want to share an option since many of my blog readers come from a variety of settings where they work with children and it can be difficult to find a variety of materials on birthday activities.