Complete series (minus "Straight Arrow" puzzle) of ThinkFun's "aha! brainteaser classics" (formerly Binary Arts company); a bunch were discontinued. Paradoxically perfect for both yourself and your kids.
- All uphill, by Frederick Swithenbank (1913 patent)
- Pack it in (a.k.a. Slothouber–Graatsma cube), by Jan Slouthouber & William Graatsma (mistaken for "Conway cube")
- 4-piece jigsaw, by Keith Wineger (1995 patent by Harry Nelson & Kenneth Walker)
- 4-piece pyramid, by Wolfgang Schneider
- Four cube, by Scott Nelson (https://www.jaapsch.net/puzzles/fourcube.htm)
- Fifth chair, by Dale Walton
- Rec-tangle (a.k.a. Lox in box), by Vesa Timonen
- Blockhead (a.k.a. Square fit), by Bill Cutler (http://allardspuzzlingtimes.blogspot.com/2011/04/blockhead.html)
- Loop trap, by Robert Boomhower (1968 patent)
- Double square, unknown inventor (but appears in a 1934 catalog of Johnson Smith company)
- Missing T, unknown inventor
- Double rings, unknown inventor
- Wing it, unknown inventor
- Lift off (a.k.a. Raketti rocket), unknown inventor
- Star burst (a.k.a. CCO burr), unknown inventor
- Four T, unknown inventor (but re-designed by Eduard Bakalar & Peter Hajek as 1993 IPP exchange puzzle)
*Actual shipping (from USA) + final 4% (5% international) handling costs will be calculated at close of auction. Note: expect upwards of $60 internationally due to COVID, needing to fit this item in big enough packaging with tracking#.
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