I've had foster kids on holidays like: Easter, mothers day, and halloween. But I have never done anything for the birth parents.
I've had an open adoption with Sam for a year now. I'm in the mindset of doing crafty/ seasonal things for Emma's birth mom so it has rubbed off on my foster care experience. Which I love! So for Father's day I had to include Joey in making a craft for his dad. To be honest Joey's turned out better than Emma's!