Can't guarantee all 480 pieces are still in the box but plenty of parts to make lots of things or expand an existing set. User guide included and more info here: https://www.basicfun.com/product/knex-35-model-ultimate-building-set/
NOTE: There are small parts so recommended for ages 7+. Can be collected anytime.
K'NEX Building Set (35 models) (Withnell PR6)
This offer has been gifted to someone and is no longer available.