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    Oregon Museum of Science and Industry
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    Learners press their fingertip onto a clean Plexiglas sheet. The fingerprints are then revealed as learners dust over the print with fingerprint powder. They can lift their prints with clear tape,...

    $1 - $5 per group Ages 6 - adult Under 5 minutes
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    Oregon Museum of Science and Industry
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    Learners use filter paper and water to analyze six different markers. They mark the paper with ink, and dip the paper in water. The water travels up the paper and dissolved ink travels with it. The...

    $1 - $5 per group Ages 4 - 14 5 to 10 minutes
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    Oregon Museum of Science and Industry
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    Learners analyze mixtures of dyes using filter paper chromatography. They place spots of the different dyes at the bottom of a piece of filter paper, and hang the paper to touch the surface of...

    $1 - $5 per group Ages 8 - adult Under 5 minutes
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    Mount Holyoke College
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    In this chemistry activity, learners use thin layer chromatography to determine the molecular composition of different markers. First, they use pure rubbing alcohol as the liquid phase, then...

    $1 - $5 per student Ages 8 - 14 30 to 45 minutes
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    Oregon Museum of Science and Industry
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    In this activity, learners examine fingerprints. Learners leave a hidden print on a surface and then make their own print detecting powder from graphite (found in pencils). The next phase of the...

    $1 - $5 per group Ages 8 - 14 10 to 30 minutes
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    COSI
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    In this forensics activity, students will explore the methods that investigators use to confirm the authenticity of handwriting. Participants will use bottom-of-letter and slant analysis to look at...

    $1 - $5 per group Ages 8 - 14 10 to 30 minutes
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    Oregon Museum of Science and Industry
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    Learners write an invisible message using lemon juice on a piece of paper. They then develop the message by soaking the paper in a dilute iodine solution. The iodine stains the paper blue, but the...

    $1 - $5 per student Ages 6 - 14 10 to 30 minutes
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    Oregon Museum of Science and Industry
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    In this activity, learners combine two substances (plaster of Paris and water) to make a cast of an object's imprint in clay. Use this activity to introduce learners to how scientists and...

    $1 - $5 per student Ages 6 - 14 30 to 45 minutes
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    WGBH
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    In this activity, learners create and reveal secret messages written with invisible ink! The invisible ink is actually a baking soda solution, and the magical revealing liquid is fruit juice. The...

    $1 - $5 per group Ages 6 - 11 45 to 60 minutes