It's fun like an arcade while supporting a vigorous STEM/ steam curriculum. 30 snap modules included to complete more that 200 projects with snap modules. - - Snap Circuits arcade offers concrete, STEM/steam concepts with fun learning activities and creativity. Snap Circuits uses building pieces with snaps to assemble different electronic circuits on a simple "rows-and-columns" Base Gird that functions like the printed circuit board found in most electronic products. Each component is easily identifiable by a different color and functional purpose. Includes over 200 projects, utilizing 30 components including an internal microcontroller pre-programmed with many fun to play interactive games, a programmable word fan, a tri-color light orb and a dual LED display. Learn the basics of electricity, engineering and circuitry with full color, curriculum-rich, easy-to-follow instructions. Requires 3 AA batteries (not included).