Being a parent is both a joyous and challenging experience. Your kids can be the most adorable and well-behaved angels one moment, and the next moment they can test your patience and drive you up the wall. Yelling or getting angry at your kids might not be the best solution, but sometimes leaving a passive-aggressive, yet humorous message can do the trick. From witty notes from mom with instructions for the day’s WiFi password to hilarious letters from dads and the funniest parenting memes, this list has it all. Take a look at some of the most amusing notes that parents have left for their kids. These parents have nailed…