Finger print Thank you notes. I love this idea for involving the kids in their thank you cards per-writing.
BIRTHDAY BLUEPRINT: Spy Party
This is a fun & easy way to decorate your christmas cards. DIY fingerprint wreath.
Monsters - coloured cotton wool 'smudges' with googly eyes & felt tip marks - from Mum of One (",)
Elf fingerprint card. I did it on an ornament. I had each of my girls choose a color for their tummies. Super cute. I added the same color ball to their hat and small dot at top of shoes (like a pom pom) as their tummy.
Make your own Monster fingerprint cards. These are so easy to make and even better to gift by Mum in the Mad House
Christmas Owl Fingerprint Card, Creative Homemade Christmas Cards Showcase, http://hative.com/homemade-christmas-cards/,
"You Make My Heart Soar" Fingerprint Card - An easy craft for Valentine's Day or Mother's Day!
like these for a more detective themed idea.
Fingerprint flowers. The boys made cards based on this idea for their grandmas for Mother's Day - they were a big hit!