Circuit blocks

A device, comprising:

• a circuit block including:
• at least one electrically conductive post configured for coupling to at least one other circuit block;
• a contact electrically coupled to the at least one electrically conductive post and including a corner section extending in at least two directions substantially perpendicular to a longitudinal axis of the at least one electrically conductive post;
• and
• a magnet at least partially retained by the contact and configured to be positioned proximate the corner section of the contact, the magnet and the corner section configured to magnetically attract at least one other circuit block.

A device, comprising:

• a substrate;
• at least one electrical component mounted on a major surface of the substrate;
• a non-conductive frame coupled to the substrate;
• at least one post electrically coupled to the substrate and the at least one electrical component and extending from the substrate and through at least a portion of the frame in a first direction substantially perpendicular to the major surface of the substrate;
• a contact electrically coupled to a second, opposite surface of the substrate and including a corner section projecting outwardly from the frame and extending in at least two directions substantially perpendicular to a longitudinal axis of the at least one post;
• and
• at least one magnet positioned proximate the corner section of the contact and configured to magnetically attract at least one other circuit block.