A very succinct and loving poem about a father daughter relationship that florishes. My own daughter is less close but the love we share is always there when we meet. The lure of the first two lines draws the reader to look for resolution. It not till the last line that the resolution comes. Great device used very well.

Joe

the break between the first 2 Ss seems arbitrary
I would avoid the repetition of 'her eyes' by editing out the first use of it, its unnecessary .
Apart from that I loved it especially the last line.
It's so easy for poetry like this to become sentimental and too personal, you've avoided that completely and yet still talked to our hearts.

I only have sons but the esteem that still occasionally leaks out of them for their imperfect father is one of the blessings of parenthood. I think in that third line that building would fit better than structuring........simpler word just seems to fit better with a child's effort lol..............stan

I'd love to share
with all my world's daughters
i have many
within family

is the one I like best out of about ten of yours which I have read. It paints a clear picture for me as well as containing a beautifully wistful glance back at the past. Being a good father to a daughter is indeed a unique experience and one which I eventually spoilt through mental illnesses, so your poem brings back memories almost lost in a jumble of later mistakes. The succinct description of sandcastle-building is sublime. There are no weak stanzas, making the poem itself a little castle, but made of something much harder than sand...
Best wishes,
Robert.

I especially like how it's structured - how the child has you at the start and you see how you have her at the end. The mutuality of the love is reflected in the structure. And the structure seems masculine somehow, hard but soft on the content inside, much like the author himself, I suspect.