Helicopter features spinning rotor blades, seat in cockpit and landing skids. It was originally inspired by Cobra (military helicopter) and finished model is quite big in comparison with original crocodile.

My third alternative model built out of set 31121 is not another figure but oversized insect - huge grasshopper. It features movable all six legs and abdomen. Since it is pretty heavy it needs some care to make it stand with chest and abdomen over ground. Building instructions can be bought exclusively from rebrickable.com where you will be redirected after clicking on "Download instructions". If you buy instructions for this grasshopper you'll get instructions for mermaid for free and if you already bought instructions for mermaid you'll get these for grasshopper for free too (you can find them on same place where you downloaded instructions for mermaid).

When I finished my "Aquaman" I've got idea to build one more fantasy creature from water so I built this mermaid. She is not perfect but I tried to make her as cute and sexy as possible. She features great articulation thanks to longer ball joints although they doesn't look that good. Finally I made little stone for her from leftover parts so she can sit on it. Notice: this model is quite solid but I don't recommnend it for playing. Building instructions can be bought exclusively from rebrickable.com where you will be redirected after clicking on "Download instructions".

Czech Aquaman is much different to Aquaman from Justice League. He is called "vodník" or "hastrman" and he often appears in traditional fairy tales. He lives in pond and his hobbies are sitting on willow, smoking pipe and collecting souls of drowned people. My figure features great articulation and few accessories: pipe, bench and little frog.