OK, she's over 18 lbs at 5 months, which puts her in the top percent for both weight and height for her age, and she won't stay still.  She spends a lot of time in her "bug" and the jolly jumper, getting her wriggles out.  Looks like we have another energetic one!  She started solids a couple weeks ago, and like her sister, does not like to waste a drop; when we stop feeding her she rubs her face on the tray of her high chair and then licks it clean.