An educational game includes a controller and a computer to operate software; a game board, having a first transparent layer with slots arranged in a grid; a second layer housing a plurality of LEDs; a third layer housing the controller and computer; and an activation button; blocks to engage with the slots, each of the blocks having an encoding on a bottom surface; the blocks represent circuit elements and the slots represent electrically active slots for the circuit elements, thereby forming a circuit; the blocks allow a user to create a user modeled circuit; and the computer creates the user modeled circuit and analyzes the user modeled circuit to create a visualization feedback associated with the user modeled circuit, the visual feedback providing one or more unique LED patterns and one or more LED brightness variables to symbolize current flow and power intensity.

A modular building block easy to assemble comprises a base plate, basic parts, and electronic individual components. First protrusions are disposed on the base plate and the basic parts, and slots are formed in the basic parts and the electronic individual components. First conductive pins and conductive metal sheets are disposed inside the basic parts. Control panels, electronic devices and conductive contacts are disposed inside the electronic individual components. The invention designs the base plate, basic parts and electronic individual components of original electronic building blocks as individual modules.

A modular building block easy to assemble comprises a base plate, basic parts, and electronic individual components. First protrusions are disposed on the base plate and the basic parts, and slots are formed in the basic parts and the electronic individual components. First conductive pins and conductive metal sheets are disposed inside the basic parts. Control panels, electronic devices and conductive contacts are disposed inside the electronic individual components The invention designs the base plate, basic parts and electronic individual components of original electronic building blocks as individual modules.

An educational game includes a controller and a computer to operate software; a game board, having a first transparent layer with slots arranged in a grid; a second layer housing a plurality of LEDs; a third layer housing the controller and computer; and an activation button; blocks to engage with the slots, each of the blocks having an encoding on a bottom surface; the blocks represent circuit elements and the slots represent electrically active slots for the circuit elements, thereby forming a circuit; the blocks allow a user to create a user modeled circuit; and the computer creates the user modeled circuit and analyzes the user modeled circuit to create a visualization feedback associated with the user modeled circuit, the visual feedback providing one or more unique LED patterns and one or more LED brightness variables to symbolize current flow and power intensity.

A hydrogel phantom is herein described. The hydrogel phantom includes a plurality of adjacently disposed hydrogel elements. A first one of the hydrogel elements has a first electrical impedance and a second one of the hydrogel elements has a second impedance. The first impedance is different from the second impedance.