Challenge yourself to make bigger and more complex electronic circuits with the Magtronix 9 Piece Expansion Pack! See if you can make a successful working circuit by adding more electronic blocks and switches to your starter set. Contains 9 electronic blocks and switches to your starter set. Contains 9 electronic pieces (switch, LED, pulser, dial and 5 direction pieces). Comes with an activity guide containing circuit ideas. Ages 5+. For use with Magtronix Starter Set (not Included).