Spintronics Power Pack Fat Brain Toys Interlocking cubes come in 10

Interlocking cubes come in 10 bright colors for sorting and grouping

and surprises

A colorful and fast-paced abstract strategy game for 2–4 players

casual players

eco-friendly inks

Spintronics Power Pack Fat Brain Toys Interlocking cubes come in 10Spintronics Power Pack Designed to enhance your Spintronics system with more power and advanced puzzle challenges Includes a second 6 V spintronic battery to expand circuit complexity Comes with two low value resistors: 100 and 50 , for more precise resistance control Contains a Power Pack puzzle book with 11 brand new, progressively challenging puzzles Requires Act One to function; to complete all puzzles, both Act One and Act Two are needed Offers