Foam Clay
  Foam Clay is an incredibly popular air drying modelling clay with small beads that are used for coating all kinds of items and surfaces.   To use, roll small balls of foam clay, pressing and spreading as you go.  It is ideal to cover the whole piece in a thin layer first, then add details after.     Foam clay can also be rolled out and cut out with cookie cutters to create the cutest designs.   The best thing for parents, is that foam clay is not messy at all and you can take your piece as soon as you finish creating it. Children spend hours perfecting their masterpieces and you do not pay extra to use it here.  It cost the same as if painting.