Sold out
Sold out
Save Liquid error (snippets/product-badge line 32): Computation results in '-Infinity'%
Challenge the PhD in your family with this set of 5 brainteaser puzzles inspired by ancient artifacts! Each challenge is solved in a completely dif...
View full details
Save Liquid error (snippets/product-badge line 32): Computation results in '-Infinity'%
Sold out
Challenge the PhD in your family with a trick lock puzzle! We love these brainteasers as smart stocking stuffers. Each metal lock puzzle is solved ...
View full details
Sold out
Challenge the PhD in your family with this wooden puzzle box. Once closed, this clever box can only be opened using a very specific method that's d...
View full details