Layer lettuce greens and broccoli florets as a background for your bento box.
For Frankenstein green pepper slice with cheese and black olive eyes. His mouth is red pepper and his "scars" are edible black marker. The bolts on the sides of his neck are cut from yellow pepper and his hair is black olive slivers attached with cream cheese.
The "fingers" are made from hot dogs cut in half and given "nails" made from sliced cheese.
Use the edible marker to create a pumpkin design on a mini cheese round.
The mummy is a mini cheese round with cheese strips for bandages and cheese eyes dotted with edible marker pupils.
Use your child's favorite sandwich to cut out the ghost. Create the ghost's eyes and mouth from black olive rounds.