avenir blocks n crayons constructionThe Construction Blocks'n'Crayons kit contains super fun eco crayons that are made from natural beeswax with all non toxic ingredients (contains no paraffin wax or cheap fillers). They are 100% eco friendly and absolutely safe for kids. There are 12 colours in 3 different construction block shapes of crayons, plus 2 construction themed colouring sheets in each gift box. Kids can combine the crayons like puzzles and construction blocks to add even more