Okay, maybe it's a good thing I accidentally started with the second book in this series, because the first book didn't appeal to me nearly as much. I still loved Jessie (except for what she did to Evan near the end of their lemonade battle), but this was much more heavy-handed about its educational aspects than the second book was.
Also, wow, Megan is a nearly perfect person. Does she have any flaws? And no, wanting to to take a break from lemonade selling to go to the beach or have ice cream is not a flaw.