Drawing a boat comprises one of the foundation lessons of teaching children how to draw. Once they are acquainted with the way of sketching the spindle shape of the hull (step 1 below), they can utilize the knowledge to draw a fish, bird, etc. which have the same basic shape.
Step 1: Make a streamline shape like that of a fish.
Step 2: Create a slanting closure to the shape.
Step 3: Draw angular guides for the hull.
Step 4: Sketch curves at the sides.
Step 5: Make the rounded bottom.
Step 6: Erase the guides and give a border to the upper part of the structure.
Step 7: Draw a plank-like structure.
Step 8: Shape a pole-like form.
Step 9: Draw the sail that resembles a triangle with curved edges.
Step 10: Detail the inner parts with curves and straight lines.
Step 11: Make arches traversing the sail.
Step 12: Do the same with the hull.
Step 13: Complete by sketching the water on which the vessel is afloat.
The boat can be colored now with shades of choice. It would give you immense pleasure when the kiddos can make the drawing to your satisfaction. A little practice and they would jump with joy at the magic their tiny hands rustled up.