The Gravity Forge

The Gravity Forge is a ninja warrior and gymnastics facility on Turnpike Drive in Hatboro, in eastern Montgomery County. The building splits into a roughly five thousand square foot Ninja Warrior section built with the angled walls, warped walls, and rig obstacles used in televised ninja competitions, plus a separate nineteen thousand square foot gymnastics area for tumbling and training. Birthday parties run on the Ninja Warrior side, where an instructor leads the group through age-appropriate obstacle course races for part of the booking before moving guests into a private party room set with tables, chairs, and tablecloths. Party packages are sold in ninety minute and two hour blocks with a set number of included guests and the option to add more children for an additional per-child charge; pizza can be added through a local pizzeria partner. The gym also runs ninja and gymnastics classes outside of party hours, so the obstacle course is a working training space rather than a rental-only attraction.