3-D puzzles are excellent cognitive boosters and stimulate one's analytical thinking skills. To make a good thing even better, the instructions are clearly written in plain language and the delightful challenge in assembling this is fun and good thinking for people of almost all ages.One has to match each piece up to the ones pictured. Each is identified by a number. The one thing I would change is to have the numbers on the dark pieces printed in a lighter color to make for easier identification. For all who need that extra cognitive kick, this is for you.
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