C&C per req;:
1. Cute, I wish it had been shot either portrait or square and included more of the top of her head.
2. As stated, the square composition isn't ideal, but it's not as bad as the tree growing out of the child's head.
3. A bit cliche for my taste and a tad under-exposed on Mom's trousers.
4. A tighter crop was needed here; the child is almost lost against the background. Don't forget, your camera will work when you turn it 90 degrees counter-clockwise!
5. Any reason to crop their heads? There's a definite green cast to their skin, and lost detail in her hair; a reflector was needed camera right to provide detail in her hair.
Just my $00.02 worth - your mileage may vary.
~John