I wanted to enlight the connection with Dad and Child. They are part of the project, within the letter "D".
The child is about to jump from his father who is waiting for him, and they are both happy.
Is a two line type logo in order to underline the importance of the "D". While the colors are chosen to show the illustration with 'Green' and the 'Blue' with the rest.
The green is symbol of calm and trustiness. While that dark blue is symbol of reliability since is an association who understands Dads in their situation.