Abstract: This baby stroller utilizes an inexpensive, lightweight, portable, strong, foldable frame, for use in supporting a central seat portion. The frame assembly includes two pairs of transversely connected sidewall elements comprised of two overlapped cross-struts which are pivotally connected to one another, and which can be releasably secured into a stable, rigid X configuration by the use of a simple, inexpensive, one-piece latching brace. The latching brace is fixedly secured to one cross-strut at a distance from its pivotal connection to the other cross-strut, while the non-secured portion of each latching brace is designed to make a releasable, latching connection to and with the other cross-strut. When the latching brace is latched to the cross-strut to which it is not connected, each pair of cross-struts and their associated latching brace form a stable, rigid triangle. This three-piece triangular structure is easily releasable to a pivotable, foldable configuration.