Join the 2 half spheres namely 1 and 2 together and you have a balloon or keep them as is and cut off the extending bit and add barrels and you have turrets for either WWI and or futuristic defenses or trench network? Likewise the 3 circular shapes could be turrets or cupola on top of turrets? As for the Wii tennis racket console game package at a guess thingy me bobs - turn them into an air conditioning vent or industrial structure one sees on futurist wargames tables which look cool but make no sense. Alternatively stop worrying about it and throw them away. Recycling suggestions may be tricky as we have no idea what they are made from though they look like typical vacuform packaging.