A wheeled carrier device is provided which, in one embodiment, includes a plurality of foldable walls supported on a base member and movable between an erected state wherein the walls define a carrier space and a collapsed state wherein the walls are folded on top of the base member. The carrier device has at least two wheels and a wheel mounting
assembly pivotably mounts the wheels on the device on opposite sides thereof such that, in one embodiment, the wheels are movable through 270° from a first, operative position wherein the wheels support the carrier device and a second, inoperative position wherein upon release of a latching mechanism the wheels are folded over on top of the folded walls in the collapsed state thereof. A
handle is affixed to the carrier device and is movable between an operative state wherein the
handle can be used to pull the carrier device and an inoperative state wherein the
handle is stowed in substantially flush relation with the remainder of the carrier. In other embodiments, the wheels are pivoted through 90° to the stowed state thereof. In some embodiments, one or more of the wheels is rotatable about a support axle and various arrangements are provided for fixating the wheels against rotation. In other embodiments, some of the same basic principles are used in a collapsible stroller / jogger as well as in a collapsible “fun car” for children.