For the puzzle loving zelda fans that want to interact with things you would need blocks that:
-open doors (fences/wooden/stone/trap doors/windows/secret...)
-disarm traps (dart/smoke/pitfall/bridge...)
-able to be picked up (planks to cross/princesses to save/ropes to swing/rivers to swim/keys to open...)
-roll, slide, bounce, catapult, ride, float, sink...
-time limits (or no time limits, just complete the map)
-melt, burn, freeze, disapear, magicaly apear, or do nothing
this is just a suggestion for interactive pieces