Another zentangle birthday card, they are great for guys cards and you can make them as intricate and fussy as you like.
I stamped the greeting first then drew in the rectangular border. Masked it then stamped some cogs and some dots. The rest is doodled zentangle.
Inks: Black document ink
Card: black, white,
Stamps: Stampin up Cheers and wishes, Sense of time and Circle of friendship
Other: black Pitt pens, masking tape