Mudskippers are neat little fish that like to hang out on land. They have modified gills that allow them to breathe air, and super brawny fins they can use to "walk" across mudflats.
 
They also like to fight with rival mudskippers and shout "GET OFF MY LAWN" by raising their pretty dorsal fins and flinging themselves into the air like absolute fishy badasses.
 
But what they REALLY love is reminding you that you are a glorious being worthy of gentleness and care.  They are fully invested in your mental health and would like you to take good care of yourself, give yourself some grace and compassion and be patient with your mistakes. 
 
Designed to stick to your mirror (so you can see it every day), this is a vinyl sticker with no adhesive.  Instead, when you wet the back, it will stick to most smooth nonporous surfaces.  They are waterproof and repositionable.
 
They will stick to your car window, too, but if you stick them on the outside they will become unstuck in the rain.  You can, however, wet the printed side and stick that to the inside of your car window facing out, just don't do it on a window that retracts or you will lose your sticker when you put the window down!