The pieces are the same size as the standard pieces, so the My First sets are compatible with every other Magformers Set.\r\nThe difference is in the colour scheme. My First Pastel pieces come in a soft pastel colour scheme (solid colours).\r\nThe My First Pastel 30 Set comes with beautifully printed activities to stimulate young minds.\r\nA great gift and a great set for younger children, to get them started with this wonderful learning toy that will grow with them.\r\nRecommended age: 18 months +