Go online to the official SpongeBob website, or search images of SpongeBob SqaurePants online. Choose several different images like SpongeBob jelly fishing or SpongeBob with different facial expressions, and save them to a thumb drive.
Drive to an image specialty store like a camera store or FedEx office. Ask the employee to blow up the images saved on your thumb drive to your specified size, at least 15 inches long by 12 inches wide, and remove any background imagery, leaving just the character.
Cut out the character from the excess paper. Draw an outline of the image on a piece of cardboard at least 15 inches high and a foot wide so they can be seen properly. Cut out the cardboard image and tape the cartoon to the cardboard for extra support. Tape the supported image to wooden yard pegs.
Place the yard cutouts in various places outside. Have a few peeking out from behind a bush or winding up the driveway.