Select several artworks to display around the classroom that express line in different ways before working with preschool students. From simple outlines to detailed drawings and paintings, line can be found. Display the artwork at a child's height, so that they can get close to pictures and use them for motivation.
Discuss different types of lines with students. Use a large sheet of white paper and a marker, and draw all the kinds of lines preschool students think of, such as jig-jag, diagonal, and curvy lines.
Talk about how the lines make students feel. Do straight lines feel different than curvy lines? Look at the artworks displayed around the room, and have students help find lines within the artwork. Discuss how the artwork makes them feel.
Provide each student with a sheet of paper and a crayon. Explain to them that they are going to create one continuous line by not removing their crayon from the paper for one minute. Time the students while they create continuous lines. When finished, discuss the lines they created and if it was challenging to create a continuous line for one minute.
Provide preschool students with a new sheet of paper and a crayon. Explain that they are now going to create expressive lines by listening to music and creating separate lines that they will coordinate. The music is inspiration for students to create different types of lines. Play music for students while they make lines.
When the class is finished, display line drawings in the classroom alongside the original artwork with which you showed them a line.