Using sketch book i will show you how to draw this ghost in under 10 minutes
1) Open sketchbook
2) take the stencil cloud shaped tool on top toolbar
3) then click the about the same shape and switch to this stencil, rotate it by clicking the arrows
4) trace it using the any desired brush and color
Add eyes and mouth by using the ellipse tool
Use the fill bucket tool and shae the ghost it and your done !!