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Estimate number of drops: Put on a tray an eyedropper, a baby food jar (half full of water), and a small medicine cup. Work in whole group or groups of 3-4 children (how you do this activity depends upon the developmental level of the children you teach). Estimate how many drops it will take to fill the medicine cup. After guessing, drop water from the eyedropper into the medicine cup to verify the guess(es).

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