Project Mc2™ Doll with Experiment - McKeyla's Invisible Ink Pen
Now you can perform an experiment at home with Project Mc2™ leader, McKeyla McAlister™. Make your own invisible ink pen just using household ingredients like baking soda and water.
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Description & Features+
Your ink may seem invisible when you’re writing your secret message, but the pen is actually leaving a residue of sodium bicarbonate (aka baking soda). When you rub your paper with a berry or tea bag, the acid in those items creates a chemical reaction with the baking soda, a base. That reaction makes your message become visible.
• Her gloved hands make sure she leaves no fingerprints behind. So many fun details!
• Also includes a fun science activity: invisible ink pen to experiment again and again
• Household ingredients not included
• Accessories for the doll include: McKeyla's Ultimate Lab Kit, beanie hat, spy disguise glasses, and beaker-shaped comb
From the Manufacturer +
Q & A+