My 2 grandsons (ages 13 and 16) are visiting from Washington State for a few weeks and they love to go fishing with grandpa.  I want to take them where they can catch some nice crappie and perhaps later in the evening try to get a walleye from the bank.  I have only fished Pymy a few times and would like them to go home with a fish story or two.  If anyone could suggest a nice place to take them I would be very greatful. 

The Causeway has the best access to deep water where walleyes and crappies tend to be located this time of year.
 
Below the dam is another place decent for shore fishing.
 
The marinas offer 14' boats with 9.9 motors cheap for rent.  That may be another option.  If you do rent a boat, pm me, and I'll give you a few spots.w_w.

Thanks for the advice W_W.  It is much appreciated.