Grades
3-6
Build-a-DNA double helix
Students build a twisted-ladder DNA model from candy or beads and discover the A–T / C–G pairing rule themselves. This is the structure that lets DNA be copied and written. Near-zero prep, and an allergy-safe bead version is included.
What students do
- Build a twisted-ladder DNA model from candy or beads
- Discover the pairing rule (A–T, C–G) by figuring out which bases connect
- Twist it into a double helix to keep or photograph
What you'll need
Licorice or pipe cleaners, gummies or pony beads in 4 colors, toothpicks, and a paper plate. About $10-20 a class; allergy-safe bead option included.
Full quantities and costs are in the materials & cost sheet.
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