referring now to fig1 of the drawing , an example of a portable jig - saw puzzle work board 10 is shown having a four - sided , substantially rectangular frame 12 . a substantially rectangular recess 14 is formed in one lateral surface of the frame 12 with a non - recessed rim 16 bordering the recess 14 on all four sides thereof . the bottom of the recess 14 defines a substantially flat work surface 18 for reconstructing a jig - saw puzzle , such as the partially assembled puzzle shown at 20 . a substantially rectangular , deformable and resilient padding 22 is provided , preferably formed of two substantially identical sections 22a , 22b , for removable insertion into the recess 14 . the work board 10 further comprises a substantially - rectangular cover or lid 24 , fastening means for removably affixing the lid 24 over the recess - provided surface of the frame 12 , and a handle member 26 for carrying the work board 10 from one location to another . each of the elements of the work board 10 is set forth in detail hereafter . at fig1 the work board 10 is shown in an open position , with the cover 24 separated from the frame 12 and the padding 22 removed from the recess 14 in the frame 12 . more particularly , the two sections 22a , 22b of the padding 22 , which , as shown , are placed adjacent to the frame 12 , provide a convenient non - slip surface for displaying unassembled jig - saw puzzle pieces 28 . this arrangement permits a user to lift appropriate puzzle pieces 28 from the padding 22 for assembly into a puzzle 20 on the work surface 18 at the bottom of the recess 14 . in most instances , a user will only partially complete the puzzle 20 during one work session and will desire to store the partially - completed puzzle 20 , together with the unassembled puzzle pieces 28 , in the workboard 10 until a future time . to do so , the user closes the work board 10 by placing the two sections 22a , 22b of the padding 22 side - by - side in the recess 14 of the frame 12 and affixing the lid 24 over the recess - provided surface of the frame 12 . the inserted padding 22 is configured to have a snug fit in the recess 14 of the frame 12 and to have a thickness substantially corresponding to the distance from the top of the rim 16 surrounding the recess 14 to the work surface 18 formed at the bottom of the recess 14 . when inserted , the padding 22 resiliently engages the partially completed puzzle 20 on the work surface 18 , fig3 and holds the puzzle 20 in a fixed position by elastic deformation of a portion of the lower surface 30 of the padding 22 over the puzzle 20 . it is readily apparent that , as shown at 33 , a portion of the upper surface 32 of the padding 22 will be caused to protrude slightly above the rim 16 and velcro material by the presence of the puzzle 20 held beneath the lower surface 30 of the padding 22 . affixing the lid 24 over the recess - provided surface of the frame 12 serves to retain the pading 22 in the recess of the frame 12 and to downwardly compress the padding 22 against the puzzle 20 . in addition , the lid 24 presses any unassembled puzzle pieces 28 resting on the upper surface 32 of the padding 22 into the main body portion of the padding 22 , thereby capturing the puzzle pieces between the lid 24 and padding 22 , as also shown at fig3 . the padding 22 is not attached to any other portion of the work board 10 . this permits a user to place the padding 22 in the recess 14 over a puzzle 20 on the work surface 18 , thereby holding the puzzle 20 in a fixed position against the work surface 18 , and then to assemble a second puzzle on the upper surface 32 of the padding 22 , which second puzzle can be held in position by affixing the lid 24 over the frame 12 . referring again to fig1 the fastening means for removably affixing the lid 24 over the recess - provided surface of the frame 12 is in the form of velcro material attached to the rim 16 of the frame 12 , as by cementing , for example , and complementary velcro material attached to a lateral surface 34 of the lid . as shown , the velcro material is in the form of a plurality of strips 36 affixed to the rim 16 , thereby being disposed proximate , and extending parallel to , the respective edges of the frame 12 . the complementary velco material is also in the form of a plurality of strips 38 , which are disposed proximate , and extend parallel to , the respective edges of the lid 24 . an important aspect of the invention is to provide substantially less complementary velcro material along one of the edges of the lid 24 , shown as 40 at fig1 than along the other edges so that the lid 24 has less adhesion to the rim 16 of the frame 12 along edge 40 . lesser adhesion along edge 40 of the lid 24 permits the lid 24 to be detached from the frame , without undue jarring of the interior contents of the work board 10 , by applying moderate lifting pressure to edge 40 . as shown at fig1 the handle member 30 is in the form of a strap 42 attached to the rim 16 of the frame 12 proximate the middle of one edge of the frame 12 . the respective ends of the strap 42 may be attached to the rim 16 of the frame 12 by any convenient set of fasteners 44 , such as snap fasteners , rivets or nails . to prevent the projecting heads of the fasteners 44 and the ends of the strap 42 from interferring with the fit of the lid 24 and the rim 16 of the frame 12 , it is preferable to provide two spaced - apart sections 46 , 48 of the rim 16 on which no velcro material is attached . each section 46 , 48 of the rim 16 not provided with velcro material is at least wide enough to accept the head of a fastener 44 and an end of the strap 42 . as an example of a method for making a jig - saw puzzle work board according to the invention , a recess 14 of the type previously described is cut into one lateral surface of a substantially rectangular piece of wood , for example , such that a non - recessed rim 16 is formed on the same lateral surface of the piece of wood about the periphery of the recess 14 . the edges of the rectangular piece of wood are provided with a curvilinear , decorative shape , as shown at 50 of fig3 . strips 36 of velcro material are cemented or glued around the peripheral rim 16 surrounding the recess 14 . a rectangular padding 22 is formed such as to be freely disposable in the recess 14 of the frame 12 with a snug fit and to have a thickness enabling the padding 22 to extend from the top of the rim 16 to the bottom of the recess 14 . a handle member 30 is also attached to the non - recessed , peripheral rim 16 . a second substantially rectangular piece of wood is provided onto which complementary strips 38 of velcro material are cemented or glued . more particularly , the strips 38 of complementary velcro material are attached proximate , and extend parallel to , the respective edges of the second substantially - rectangular piece of wood . however , substantially less complementary velcro material is attached along one edge 40 of the second piece of wood than is attached along th other edges .