Fingerprint Investigation
Updated: Oct 12
Every person on Earth has fingerprints that belong only to them, and toddlers find that amazing. Today your little one becomes a detective: they collect fingerprints from everyone in the house, then look closely to see whose is whose.
What you need
A washable ink pad (or washable paint on a paper plate)
White paper or index cards
A magnifying glass (a cheap plastic one is perfect). We like this kind
A marker for labels
Baby wipes, for cleanup
How to do it
Make a detective card. Write each family member's name on their own card. Add pets too; a paw print counts!
Press and roll. Show your child how to press a fingertip on the ink pad, then roll it gently onto the card. Start with their thumb. Rolling side to side gives a clearer print than just stamping.
Collect everyone's. Let your child "take prints" from each person. Kids love being the one in charge.
Investigate. Look at the prints with the magnifying glass. Point out the lines. Do they swirl like a snail shell, curve like a hill, or loop like a slide?
Compare. Put two prints side by side. Ask, "Are these the same? What's different?" Even if they can't spot the difference, the looking is the point.
Turn prints into art
Once the investigating is done, add a few marker lines to turn each fingerprint into a tiny critter: legs for a bug, ears for a bunny, a string for a balloon. Or make a fingerprint family: one print for each person in your family with faces drawn on. It goes perfectly with today's book, The Family Book by Todd Parr.
Why we love it
Toddlers are just starting to understand that they are their own person, separate from everyone else. Fingerprints are a hands-on way to show that. You're also building early science skills: observing closely, comparing and describing what they see. And pressing and rolling a fingertip is great fine-motor practice.
Tips from our table
Wear old clothes or roll sleeves up. Washable ink is washable, but it can take a couple of washes.
Some toddlers don't like messy fingers. Keep a wipe right beside the ink pad so they can clean off between prints.
Keep it short. Five minutes of investigating is a win at this age.
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More for this week: see all our All About Me activities, Letter A activities and Number 1 activities.
Every child is different. Please use your own judgment about what's safe and right for your family. Always supervise children during activities and while eating, and adjust foods for allergies, dietary needs and your child's age and chewing ability. Sprocket & Sprout shares these ideas for fun and learning only. We are not responsible for any injury, allergic reaction, damage or mess that may result from trying them. This post may contain affiliate links; if you buy through them, we may earn a small commission at no extra cost to you.
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