You'll need tempera paint, square and rectangular objects to stamp and some paper.

Stamping Rectangles and Squares

You'll need glue and some paper rectangles and squares.

Paper Collage

You'll need tissue paper and watercolor paper.

Tissue Paper Painting

You'll need painter's tape, paint and a brush.

Painter's Tape Paint Resist

You'll need watercolor paints and a white crayon or pastel.  Best done on watercolor paper.

Art Cards

You'll need crayons and a comb or corrugated cardboard.

Rubbing Lines