Brain Strain was produced by Family Games of Canada. The object of this puzzle is to remove the cord and ball from the wooden blocks.
Brain Strain in package
Scroll to the bottom of the page to see the solution.
Pull the loop at the center of one of the blocks about 6" through.
Then thread this loop through the hole on the same block that is nearest to the ball.
Pass the loop over the ball and other block, then pull the loop back through the hole.
The cord will now be free from the block.