Why the Bricklayer Smiles

Today is "bring your child to work" day and Logan gets to go with his mom to her jobsite. Logan's mom is a bricklayer. Her coworker, Aidan, frowns while he works, but Logan's mom smiles and whistles. When Logan asks Aidan what he is doing, Aidan tells him all about the job he HAS to do. Logan doesn't understand why his mom seems to like it so much, until he asks her.