Most homes will have coloring pencils or crayons. In my house we also have glitter pens, foam pens and most importantly paints for the kids to select between. Using paints will require a little bit more setup time as you may need to clear an area and lay newspapers down over the table to protect it.
It can be hard to host a party or other gathering at your home if you don't have lots of activities for the kids to be involved with. You can have a supply of crayons, markers, colored pencils, and even water paints on hand. These will allow them to complete the Spongebob coloring sheets in a creative way.
Coloring pages for girls will allow your little princesses to show their flair and creative powers in many ways. While young they may not make the most beautiful creation and they may not color inside the lines all the time but they will color some amazing things (in their eyes). As they grow older they will begin to desire to color inside the lines and to combine the proper colors to make some truly wonderful pictures that you will be proud to display and may even want to frame.