I used: Mood color changing nail polish (from Claires) & tape.
Lay tape onto your nails any which way you like, cutting designs into the tape if desired and then add color! Quick & cute :)
I used PEACEFUL/CONFIDENT (aqua/turqoise) color on the very left, top row. It changes with warm & cold water.
I also have the baby pink which is so pretty.
PHOTO FROM GOOGLE, sorry it's blurry.