I like this photograph. Its cute and simple. I like how the grass is bright and how it contrasts against the blue sky. Nice clouds . (just saying)
Some advice would be to try working with angles and focus points, like making the tree the focus point by having it in the center and taking the picture from the ground.
"Clocks slay time... time is dead as long as it is being clicked off by little wheels;
only when the clock stops does time come to life."--William Faulkner
This is a lovely photo, and as BalletDancer7 said, the colours are nicely contrasted although not very sharp.
My only critique would be that you only just missed having the horizen right in the middle of the photo. It is best to use a rule of thirds, where you divide the photo in to three horizontally, so either the sky is 1 third, and the ground two, or visa versa. Does that make sense? Otherwise, nice pic!