M.S.
my son has a strong personality, and although he is smart if he is not interested in learning something he WILL NOT get it-- deliberately. We just let him follow his interests, and he did get interested in reading and writing lately and it was an instant thing-- i've been shocked at how much he knows!!! but i'm glad i didn't fight with him over it because it would've just made us all frustrated.
one thing he totally loved was a lightning mcqueen math book... it was so "cool" because it was all about cars... and before that book he had no interest in workbooks.
don't stress, he'll get it when he gets it. be ok with learning being a gradual process!!
candyland and duck duck goose and preschool worksheets are all things that my almost 4 year old kind of gets but not quite-- i would say that those are more for 5 year olds as far as development and interest. so don't worry, it's ok if he doesn't quite get it.
i would say let him be physical and just wait till he wants to learn the school skills. present these things as fun options but don't force it-- that will make him not want to learn even more! he still has plenty of time and sounds a lot like my son who is now thriving in kindergarten...
enjoy your time at home with your kids! remember that a loving relationship with mom is MUCH more important than holding a pencil or circling the 4s. laugh and play together, read books, enjoy each other!