Help my Aunt prepare to foster her Grandbabies

My Aunt Mary has recently taken on the role of Foster parent for her 3 grandbabies as her son fights to get his parental rights back. Their mother will not be in their lives for a while. So many of our family has come together to help but it's a total transition with her smaller house that she shares with my Grandmother and the stipulations for her to be their Foster so they can be with the only family they know. I am asking for help to get them comfortable and transitioned.