Use yellow LEGO pieces for the corn kernels
Use green LEGO pieces for the husk and leaves
Build a narrow cylindrical core for the cob
Attach yellow studs or small plates around the core
Stagger the yellow pieces to mimic kernel rows
Add green slopes or curved pieces around the lower half
Extend a few green leaf elements outward from the sides
Shape the top with a small yellow tip or green husk cover
Match the corn size to the scale of the LEGO photo scene
Place the corn on a base or in a crop row for context