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A collapsible barrier has at least three integrally-formed wall sections with a plurality of contiguous living hinges, as a series, joining each adjacent pair of wall sections, the at least three wall sections including two endmost wall sections joinable to form an upright structure. A collapsible b

A collapsible barrier has at least three integrally-formed wall sections with a plurality of contiguous living hinges, as a series, joining each adjacent pair of wall sections, the at least three wall sections including two endmost wall sections joinable to form an upright structure. A collapsible barrier may include a plurality of interconnected wall sections each having a top-facing side, where one of the top-facing sides has a pocket adapted for securely holding a light. A thermoformed unitary plastic object may include at least two wall sections, at least one hinge member connecting adjacent interior ones of the wall sections' longitudinal sides, the hinge member comprising a plurality of interconnected living hinges, where a nominal thickness of the at least one hinge members of the thermoformed unitary plastic object approximates 0.100 inch.

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1. A collapsible barrier comprising at least three integrally-formed wall sections with a plurality of contiguous living hinges, as a series, joining each adjacent pair of wall sections, endmost wall sections of the at least three wall sections being joinable to form an upright structure. 2. The col

1. A collapsible barrier comprising at least three integrally-formed wall sections with a plurality of contiguous living hinges, as a series, joining each adjacent pair of wall sections, endmost wall sections of the at least three wall sections being joinable to form an upright structure. 2. The collapsible barrier of claim 1 further comprising a first top section formed integrally with and joined to one of the wall sections by a top hinge member that includes a plurality of living hinges formed as a series. 3. The collapsible barrier of claim 2 wherein: the at least three integrally-formed wall sections include first and a second endmost wall sections adapted to be joined to one another for erecting the collapsible barrier, the first and second endmost wall sections each having an outward-facing wall with a top side and a projecting portion on the respective outward-facing wall adjacent the respective top side; andthe first top section having perimeter sides which include first and second sidewalls each approximately orthogonal to the top surface, each of the first and second sidewalls having an inward-facing wall with a projecting portion,whereby when the first and second endmost wall sections are joined to one another, an urging of the first top section downwardly onto the first and second endmost wall sections causes the projecting portions of the first and second sidewalls to engage respective ones of the projecting portions of the first and second endmost wall sections, thereby securing the first top section to the wall sections. 4. The collapsible barrier of claim 2 wherein the wall sections and the first top section are adapted to be interlocked with one another for erecting the collapsible barrier. 5. The collapsible barrier of claim 2 further comprising a second top section formed integrally with the first top section, wherein the second top section is adapted for being part of the top surface of the collapsible barrier. 6. The collapsible barrier of claim 1 further comprising joining means for attaching endmost ones of the three wall sections. 7. The collapsible barrier of claim 6 wherein the joining means include at least one of a zip tie, a hook and loop connector, a clasp, a latch, a snap connector, a pin, and a locking connector. 8. The collapsible barrier of claim 6 wherein the joining means is not integrally formed with the wall sections or top section. 9. The collapsible barrier of claim 1 formed as a single sheet of thermoformable polymer. 10. The collapsible barrier of claim 1 wherein the three wall sections each has an essentially rectangular hole formed therein. 11. The collapsible barrier of claim 10 wherein the rectangular holes are each adapted for passing a boardlike member therethrough. 12. The collapsible barrier of claim 10 wherein the three wall sections are foldable one on another, and wherein, when the barrier is thereby folded, the rectangular holes are aligned with one another. 13. The collapsible barrier of claim 1 wherein the three wall sections each has an essentially round hole formed therein. 14. The collapsible barrier of claim 13 wherein the three wall sections are foldable one on another, and wherein, when the barrier is thereby folded, the round holes are aligned with one another. 15. The collapsible barrier of claim 13 wherein the round holes are each adapted for passing a pipelike member therethrough. 16. The collapsible barrier of claim 1 wherein the at least three wall sections are foldable one on another whereby the folded collapsible barrier has a footprint approximating that of one of the wall sections. 17. A thermoformed collapsible barrier comprising: at least three wall sections, each wall section having a top edge, two longitudinal sides; andat least one wall hinge member connecting adjacent interior ones of the wall sections' longitudinal sides, each such wall hinge member comprising a plurality of living hinges interconnected as a series to form an upright structure. 18. The thermoformed collapsible barrier of claim 17 further comprising: a top section having a number of perimeter sides corresponding to the number of wall sections in the plurality of wall sections;a top hinge member connecting one of the perimeter sides of the top surface to one of the plurality of top edges, the top hinge member comprising a plurality of interconnected living hinges. 19. The thermoformed collapsible barrier of claim 17 wherein the series of interconnected living hinges includes a longitudinal rib between adjacent ones of the living hinges, the adjacent living hinges each having respective radial curvatures, and wherein a ratio of a lateral width of the rib to at least one of the radial curvatures is based on a desired transfer of bending force between the adjacent living hinges. 20. A thermoformed collapsible barrier comprising: at least three wall sections;at least one hinge member connecting adjacent interior ones of the wall sections' longitudinal sides to form an upright structure, the hinge member comprising a plurality of interconnected living hinges,wherein a nominal thickness of the at least one hinge member of the thermoformed collapsible barrier approximates 0.100 inch. 21. A method of providing a collapsible barrier having at least one elongate rib separating adjacent ones of a plurality of living hinges, the plurality of living hinges connecting two wall sections, the method comprising: determining a range of travel for the plurality of living hinges;determining a desired force distribution profile for the range of travel; andimplementing the desired force distribution profile for the plurality of living hinges by selecting a ratio of a width of the elongate rib to a minimum thickness of the adjacent ones of a plurality of living hinges.