Baby shower host gift?!

So my baby shower is this weekend.. my mom and mother in law to be have gone to hell and back to make it perfect for me. They've put so much money, time and effort into this that I want to do something for them during the shower to say thank you and make sure they know how much I appreciate their help and support.
Anyone ever done this and have ideas of what I could do/get for them?? 😊