Most daycare positions require certification in CPR, First Aid, or both. It's wise for you to bring your current certification with you so that the hiring authority can take a copy of your valid documents and keep them for your candidate file. If your certifications are not up to date, at the very least, you should go into the interview with a plan in place.
"My CPR certification expired last week, but my First Aid is valid for another six months. There is a recertification course being offered next week, at the community college, and I am registered to attend. If you would like, you are more than welcome to take a copy of what I have, and I will send you my proof of recertification the moment I have it."
"I recertified my CPR and First Aid just last month. I brought my certificates with me so that you could make a copy for my file. Are there any other certifications you like to see, in regards to health and safety?"