Since 1980, more than 350 million Rubik's Cubes have been sold worldwide, making it the No. 1 best-selling puzzle of all time. "It's amazing that Rubik's Cube is still just as popular today as when it was first introduced at Toy Fair in 1980," says David Hedley Jones, senior vice president at Rubik's. The classic puzzle remains a staple of toy department shelves. To up the ante, the company Techno Source has adapted it for its Rubik's Slide electronic puzzle game. It touts the new toy as combining "the simplicity and fun of casual games with fast-paced, brain-busting cubing." Much like the slide or "fifteen" puzzles from years ago, players begin each puzzle by checking the goal pattern and sliding the lights into the correct pattern by twisting and shifting the top panel. Once the puzzle is solved, it will advance to the next of more than 10,000 pre-programmed puzzles. There is even a "lightning round" for braniacs craving a fast-paced variation. The new puzzle is a follow-up to the company's Rubik's TouchCube, the first completely electronic solvable Rubik's Cube. It has touch-sensor technology on all six sides, a motion-detecting accelerometer and colored lights in every square.