Knex budding builders building set any creation is possible with the new knex budding builders tub includes 100 colourful parts and pieces to create 50 amazing building ideas building with kid knex aids the growth of key developmental abilities like fine motor skills hand eye co ordindation and dexerity and this et has endless possibilities for a child imagination to grow comes in a handy re usable plastic storage box suitable for ages 3 5 years