This toy pen doesn’t just write. The nib retracts with a twist of the rubber grip, the “spider claws” open and close by sliding a collar, and best of all it shoots a foam “web dart” at the press of a button.
Fitting this functionality into the limited space available was a serious challenge. The foam dart is fired using air delivered by a spring-loaded piston which is cocked by pulling the pen lengthwise. The spider body is the trigger, releasing a catch holding the piston in place against the spring force.
Spiderman Pen Product Design has multiple safe, fun features in a limited space: a retracting web, clasping spider claws and a shooting foam “web” dart.