Hi Pam. You can only modify the images that are already in the game. If you want a new kids bed without modding an existing kids bed, you can place the bed directly on the map and save it (making sure you have a duplicate copy of the original map in a safe place of course). The bed will not be usable because there is no programming for it, it'll just be "for show," like the heater in this mod. I hope this helps.