To paper mache' you need to have a Glue Mixture, then you need to get some old newspapers and cut them into strips, 1" or 2" strips work well, then just dip your newspaper strips into the glue mixture and apply to your object(s) you want to paper mache'.
You can also use tissue paper.
NOTE: if you are using tissue paper to paper mache' with - like for the ghost- make sure you place the tissue paper on your object first then pour the glue mixture into a spray bottle and spray the glue onto the paper!! If you dip tissue paper it will turn into mush and melt before your eyes!!!