When Rikki quits her job out of frustration, Emma runs after her saying "you can't just quit. You have to fill out a resignation form!"
When they're trying to deal with a frozen Miriam...
Lewis: Rikki will use her powers to try and warm the body—
Emma: Don't call her that!
When Miriam gets revived, Emma rushes forward and hugs her frantically while Miriam hasn't got a clue what's going on.
Kim gets a lovely Be Careful What You Wish For moment in the wish granting episode. Cleo is in the bath and Kim is ranting to her father "I just wish I could have a shower when I wanted one!". This activates Cleo's wish-granting powers (she's in mermaid form) and Kim gets showered with the garden sprinkler.
Most kids trying to fake being sick to get the day off school would pretend to cough or sneeze. What does Cleo do in "Under The Weather"? She pretends to faint.