Cut off adults are ok, if your intention was to focus on the children's perspective of the event.
I feel that the shot could have been improved anyway by not cutting the children's legs, plus a view from their eye level (in this case slightly above).
Besides that, you captured a nice, broad variety of miens, each one awaiting the great moment in a different way.
I disagree. I would crop even more. Get rid of the white blob to the right and crop up just above the front girls dress hemline. Focus on the kids, it is a rare shot to catch all of them clearly like this. Take advantage of it.
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[URL=https://camera-info.com/photocommunity/gallery/photos/93/]93[/URL] by [URL=https://camera-info.com/photocommunity/gallery/authors/fpiedfort.0/]Fpiedfort[/URL] on CI Photocommunity