When I do my interviews I never give my handbook out unless they ask for it and I do it at the end and I take a few minutes and go thru it with them but then tell them to read it thoroughly at home. I don't offer drinks. Basically the parents enter right in the daycare as I have a separate daycare space. I introduce myself to the child and they just start playing. If the interview is on a week night then my kids are present and if it's on a weekend then my husband is home and the kids are flitting in and out. I show them around the daycare giving them a run down of our day, they ask their questions, and I watch the child play. That's about the extent of my interviews.
I would try to be natural and easy going .... Good luck