Rattle Writer

Build this Rattle Writer using just a pool noodle, electric toothbrush (found for $1 at dollar stores), a plastic knife, washable markers, rubber bands, googly eyes (optional but fun), paper, duct tape, and a ruler. Once you have built your Rattle Writer, let the engineering begin! Can you get it to draw a straight line?…

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Density: Condiment Packet Cartesian Diver

Using an empty 2-liter bottle, condiment packets (ketchup, mustard, mayonnaise, etc), water, salt, and a bowl, children will explore how to make the condiment back rise and fall at their command as they make a Cartesian Diver. Children will also learn about density and the density rule for sinking and floating.

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