My site is here. As you can see, my R and L sidebars end after the widgets. Is there anything I can do to make them the same height as the center column? Thank you!!

the sidebars DO extend to the bottom, it's just that your text in the center is longer than the amount of widgets you have.

To visually have the sidebars extend you could use the following in CSS Inserts.

#left, #right {
    background: #EEE9F2;
    border-radius: 10px;
}

Then you will also need to add side padding to the center column and perhaps take out the borders that show.

As just got reminded by Juggledad you can put the code needed (see below) into the appropriate box in Style and Edit Sidebars.

background: #EEE9F2;
    border-radius: 10px;
}

Thank you so much lmilesw! I just donated for your time.