The wave does the work here, not the character. Leave the water white and the curl reads as water; fill it solid and it turns into a wall. A pale blue at the top of the curl and nothing at the bottom is the trick worth telling a child. His arms are out for balance, which is what makes the pose read as movement. This Stitch surfing drawing belongs on a summer wall. The ukulele is the quiet one.
Stitch rides a board through a curl of water.
More stitch drawings to try
Stitch Surfing: how to draw it step by step
Here is stitch surfing in 8 steps.
Sketch the curling wave first, sweeping up to the right.
Lay the board across the face of the wave.
Stand Stitch on the board, knees bent.
Add the head and both ears, streaming back.
Throw both arms out wide for balance.
Put in the face: eyes, nose, open mouth.
Add spray flicking up off the back of the board.
Finish the foam lines running along the wave.
What you need
Paper, a pencil and an eraser.