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A step-by-step photo collage shows hands building a DNA model from red licorice, marshmallows, and toothpicks on a wooden table.

A step-by-step photo collage shows hands building a DNA model from red licorice, marshmallows, and toothpicks on a wooden table.

Ultra-realistic step-by-step photo collage of a school science project showing how to build a DNA double helix model with NO glue. Step 1: A flat DNA ladder made from red licorice candy strands and white mini marshmallows connected by toothpicks on a table. Step 2: Wooden skewers inserted inside each licorice strand to make them rigid. Step 3: Diagonal toothpick cross-bracing between marshmallow base pairs to prevent twisting. Step 4: Finished DNA double helix twisted into shape, standing upright on a foam board base. Natural classroom lighting, realistic photography, educational style, very detailed. See more