"These gears make the kids think while they are building items.  Fun to see how each of them make more things turn as they build as well.  So glad I bought one for each of my grandsons!  I think they will continue using these unlike some toys that they outgrow.  Can't see that happening and also these are very well made!"  That was my original review....then we actually played with them.  I think they aren't going to be used much after seeing that my 5 yr. old grandson could care less!  Hopefully the interest will spark.  I did show him how they could be used but no interest at this point.
"These gears make the kids think while they are building items. Fun to see how each of them make more things turn as they build as well. So glad I bought one for each of my grandsons! I think they will continue using these unlike some toys that they outgrow. Can't see that happening and also these are very well made! "  That was my original review.... then we actually played with them. I think they aren't going to be used much after seeing that my 5 yr. old grandson could care less! Hopefully the interest will spark. I did show him how they could be used but no interest at this point.