Permanent Sand Castle

2 cups sawdust
1 cup wallpaper paste powder
1 cup water
Sand castle molds, cans or paper cups
Forks, knives and spoons

Mix sawdust and wallpaper paste powder with your hands in a large bowl. Add water and stir until it mixed well.

Pack the mixture into a mold, then carefully take it out. When you're done, let it dry in a sunny place for a few days.

You can decorate the sand castle with sea shells or paper flags.