"Ups-a-daisy" and it's various forms.
"An exclamation made when encouraging a child to get up after a fall or when lifting a child into the air. ... The 'daisy' part is a fanciful extension of 'day', perhaps alluding to the child being on the ground amongst the daisies. Of course, the name daisy itself derives from 'day' - the flower, which closes at night and exposes its yellow centre in sunlight, was thought of as the day's eye."
Egads! I'm learning too much here.