what are the different size legos?
['Regular lego.', 'Duplo. Intended for younger children than regular Lego. ... ', 'Quatro. Intended for younger childern than Duplo. ... ', 'Primo. Intended for babies. ... ', 'Modulex. Intended for architectural models and commercial signage. ... ', 'Samsonite Jumbo Bricks. Not compatible with regular Lego bricks. ... ', 'Lego Soft Bricks.']