Circuit blocks

1. 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, the at least one post configured to electrically and mechanically couple to a second device in a vertical stacked configuration;

a conductive contact electrically coupled to each of the at least one post and a second, opposite surface of the substrate, the conductive contact including a curved section projecting outwardly from a corner of the device and extending in at least two directions substantially perpendicular to a longitudinal axis of the at least one post;

at least one magnet at least partially retained by the conductive contact and positioned adjacent the curved section of the conductive contact and configured to magnetically attract a contact of a third device over varying relative angles between the device and the third device coupled in a horizontal configuration; and

a non-conductive cap configured to couple to a portion of the non-conductive frame and at least partially enclose the at least one magnet, the non-conductive cap including at a recess having a portion of the conductive contact exposed therethrough for electrically and mechanically coupling to a post of another device coupled in a vertical configuration;

the curved section of the conductive contact configured to maintain electrical contact with the contact of the third device over the varying relative angles between the device and third device up to 180 degrees while being coupled together in the horizontal configuration.

2. The device of claim 1 , wherein the non-conductive cap comprises a transparent material.

3. The device of claim 1 , wherein at least a portion of the non-conductive cap is configured to be positioned between at least a portion of the at least one magnet and at least a portion of the curved section of the conductive contact.

4. The device of claim 1 , wherein the conductive contact comprises stamped sheet metal.

5. The device of claim 1 , wherein the conductive contact is configured to enable each of an N-pole and an S-pole of the at least one magnet to be simultaneously positioned proximate the curved section of the conductive contact.

6. The device of claim 1 , wherein the at least two directions includes a first direction along a first surface of the frame and a second direction extending along a second surface of the frame, substantially perpendicular to the first surface.

7. The device of claim 1 , wherein the at least one electrical component comprises one of a battery, a light-emitting diode (LED), and a motor.

8. The device of claim 1 , wherein the non-conductive frame comprises at least one non-conductive post configured to mechanically couple to the second device in the vertical stacked configuration.

9. The device of claim 1 , wherein the curved section of the conductive contact comprises an outer edge and an inner edge, opposite the outer edge, wherein the curved section includes a flexible, conductive material configured to be displaced toward the at least one magnet in response to a force applied to the outer edge.