First, you draw the basic square shape of Spongebob lightly in case you need to erase. Add a long horizontal rectangle beneath the square base to make his pants. Then simply add two small rounded squares at the bottom at each side of the pants. These will be the shorts part.
Add the legs of Spongebob by adding two lines to the bottom of his shorts and then connecting it at the shoe. Add three stripes to the middle of Spongebob's leg. This represents his socks. Do the same on the other side. Then, add the sleeves on both sides and draw light lines out of each. Make them cross a few inches above the pants.
Make Spongebob 3-dimensional by drawing slanted lines on each corner of the square of Spongebob. Next, draw two circles inside the square and add a small circle inside. Draw another circle inside that. Then, draw the three eyelashes on top of the eyes.
Draw Spongebob's nose below his eyes which is just two lines that meet rounded. Draw two rounded lines on each side of the square. Then, draw a strait line connecting the rounded lines and draw a large curved line connecting them much lower.
Connect his arm completely and add a hand to the end of each arm. Add lines going across his pants shaded black representing his belt. Also add two triangles to the end of his pants on both sides.
Add Spongebob's buck teeth. Also add two lumps indicating his tongue at the bottom of his mouth. Draw music notes high in the air showing he is listing to Gangnam Style. Also add a tie at the middle of his pants.
Draw squiggly lines over top of the square base. Then, draw holes all over his body. After you have done all 7 steps, you should have a complete picture.
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