Task Forces and Convoys: A Naval Chess Game
I designed this to share my interests with my then-7-year-old daughter Johanna, and she immediately started beating me in it. :-/ :-)
It's a cross between old Battleship, Evade, Stratego/Dover Patrol, and … chess, and it includes a still-simple "Advanced/Historical" version with lots of WW2 battles/scenarios.
My innovation is – on the big hexagonal board – as many as 3 mutually adjacent ship pieces being moved together as 1 task force, as 1 movement. (Number of movements = total number of ship pieces divided by 3, with fractions rounded UP.)
I also have plans (to be printed off onto cardstock, scored for folding, scissored out, and folded and bases glued) on the webpage for triangular-cross-section stand-up pieces. Air units have a maximum (but less effective) range of 2 hexes.
link