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Over 1 or 2 days, learners use vinegar to remove the calcium from a chicken bone. They then explore how the bones have changed. An accompanying video with Mr.

This is an activity (on page 2 of the PDF under Bone Regrowth Activity) about the two main components of bone - collagen and minerals (like calcium) - and how they each contribute to its flexibility a

In this activity (on pages 19-24 of PDF), learners soak chicken bones or eggshells in vinegar for several days.

This activity features two connected hands-on activities about dinosaur bones.