Have children look in a mirror.
If possible use skin color paints, if not any will do.
Let the children paint their face right on the mirror.
Take a piece of paper and press against the mirror.
Carefully peel off and hang dry. Compare everyone's portrait
for differences such as shape, color, size.

You can take these pictures when they are dry and play a guessing game
of who is this?

Same as above using a mirror to paint on.
First have children pick their favorite animal
and a find a picture of the animal in a book.
After they identify the colors on their animal, provide
them with those colors. They can outline their face and
add stripes, spots, etc... to resemble favorite animal.
Carefully peel off and hang dry.

Now you can play a game of guessing what animal:}

Blindfold a child.
Direct child to an easel and help them feel the brushes and paper.
Let them paint without seeing what they are doing.

Provide several tubes of fabric paint.
Cut a cardboard square to slip inside of shirt so paint does not go through.
Cut out different sizes of cardboard shapes to use as stencils.
Squares, ovals, circles, triangles, etc...
Have children trace the shapes with fabric paint.
Allow 24 hours to dry.