# Sticky Pictures

Here's your nightly math! Just 5 quick minutes of number fun for kids and parents at home. Read a cool fun fact, followed by math riddles at different levels so everyone can jump in. Your kids will love you for it.

# Sticky Pictures

September 3, 2014

Post-it® Notes, those colorful, sticky squares of paper, are the most fun school supplies out there. They were invented by accident back in 1968, when 3M employee Spencer Silver made a glue that wasn’t as strong as he wanted, but turned out perfect for sticking paper together temporarily. Today people use Post-it® Notes as bookmarks, name labels, reminders to themselves — and as art. Artists got together at the Walker Art Center in Minneapolis to create a “pointillist” picture, which means art made of zillions of colored dots, like our recent cake-sprinkle puppy picture. Here, over 2,000 of the 3-inch square stickies form a giant image that’s much taller than you are. Up close it’s hard to see what it is, but if you step back – or look at a tiny copy – you see that it’s a picture of musicians. Hopefully those Post-it® Notes don’t all list tasks we need to do!

Wee ones: How many colors of Post-it® Notes can you count in the mural? Count as many as you can! (You can skip black and white, since technically those aren’t “colors.”)

Little kids: If you use 9 orange Post-it® Notes to make a drum, but then cover the center one with a different color, how many orange Post-it® Notes are still showing?  Bonus: If you stick 10 Post-it® Notes on your bedroom door to make a flower, then stick 10 more on the wall to make another, how many Post-it® Notes do your flowers use?

Big kids: The mural appears to have 28 rows of Post-it® Notes top to bottom. If each sticky note is 3 inches tall and all rows touch without overlapping, how tall is the picture in feet? (Reminder: One foot has 12 inches)  Bonus: It looks like the picture is 80 Post-it® Notes wide. How many Post-it® Notes were used to make the picture? (Hint if needed: To multiply by 80, you can multiply by 8 first, then by 10…and to multiply by 8, which is 2x2x2, you can just double the number 3 times in a row.)