Led light stax expansion kitkeep collecting led light stax blocks to build create and add new light featuresthe led light stax expansion kit comes with six extra blocks to add to an existing light staxclick here to see the original light staxproduct detailsindividual block size3 x 3 x 2 cms approxextra informationadditional blocks for your light stax collectioncontains 6 multicoloured light stax blocks