On the left, a fine selection of Roseart crayons left in the sun for over 12 hours. Barely a trickle, I'm sure you'll agree. On the right, the damage of just 3.5 hours' sun on a pack of Crayolas is evident.
Let this be a warning to any tight-fisted primary schooler: you want all that elbow grease you've put into attempting to transfer colour from a crayon to paper to be in vain? Get yourself a pack of Crayolas, before I show you the next "scientific experiment" I have up my sleeve. Now scat! [Reddit via BuzzFeed via Geekologie]