Toy car key (printer friendly-er remix)

My daughter wanted car keys because every one in the family has car keys.

The model by @Backmann3D is gorgeus and looks exactly like mom's, but I had some troubles printing that, so I redesigned it from the ground up to achieve the same final look but with some tweaks for easier printing, like using chamfers instead of fillets for the parts facing down, a bit wider key blade (still needs a brim, but it is more forgiving)…

I also added a “magnet” version for the lower housing and keys, in addition to having slots for opposing 5x1 magnets there is extra clearance to allow about 1mm travel for the keys. 

This is an alternative to printing the keys in TPU, or just living them solid (which is what I did ultimately, and my daughter was happy none the less… no amount of overengineering a toy  will be as effective as a child's imagination anyways).