Can I give guardianship or temporary guardianship to my one year-old son's grandmother using only a notary?

I had a one-year-old son and his father just recently passed away. Can I give guardianship or custody to my mother-in-law, my son's grandmother, so that she can look after him for as long as she needs to until I can get back on my feet? She will take him to another state. I don't know how long it will be. It all depends. I'm going to give her his birth certificate, his SSN card and records showing that he's had his shots. I don't have the money for an attorney and I don't have the time to set up some type of a court date. Is there any type of legal forms that I can print out and then, I, myself and my son's grandmother can fill out and sign in front of a notary? His grandmother can use so that form to put him in daycare and school and be able to take him to the doctor if needed. I don't want to have any problems for me or his grandmother so I want her to have proof that she's has custody or guardianship so she can care for him properly. What's the best way for me to do this?