Building blocks cap: Get a kids' DIY building blocks cap. 450 pieces: Comes with 450 colourful building pieces to customise your cap across the front and rim in a style that suits you! Customisable: Kids will love creating a range of cool designs for their hat! Colours: Choose from black, pink, navy, blue or white. One size: 52-56cm (fits ages six to nine years). Compatibility: Compatible with branded building blocks. Kids' Building Block Customisable Cap | Blue | Living Social