If I haven't mentioned it before, there are some major differences between Lucas and his cousin Dani.
Mainly, Lucas is very crabby and always has "una cara de mala leche," whereas Dani is bubbly and giggly and, well, enjoyable to be around.
Don't get me wrong, Lucas has his cute moments. He just isn't the kind of kid who laughs very much. Or hugs. Or smiles.
The two videos below pretty much demonstrate the key differences between the two.
These videos were taken during the boys' Christmas concerts at school. As you can see, they were suuuuper adorable. Lucas' class dressed up as presents, and Dani's class dressed in jeans and "rock and roll(?)" clothes. Which explains the random leather jacket kid with the super cool attitude in Dani's class.
I think you'll figure out who is the focus of each video, but if not, Lucas is the sourpuss, and Dani is the bubbly one in a blue tie.