My girls are 3 and 1 so I am similar to you. I greet them at the door and we all go down to my basement. My girls just go off and play. My interviews are very casual. I can tell within a few minutes of general chit chat if I am interested. I basically just sit on a mat, let them have a look around, talk about myself, ask about what they are looking for in a daycare and go over the main points in my contract. I don't read from my contract or give anyone anything to take home. I also make sure they know I am interviewing them as well and that it is extremely important for me to work with families that fit in with mine and others in my care.

If a family contacts me after the interview expressing interest then I email them my contract.