by fheflin

The is the wacky cat's clean up car. You can add all manner of items to the hands. I modeled the fish, fish tank, and broom and included them here. I just glued them to the hand with SuperGlue.
I "distressed" the car and steering wheel with bumps and bends after printing to keep it  more in the spirit of the cat. You can use a heat gun (or immerse the parts in hot water, then pull them out to manipulate them). Be careful not to burn yourself!  
The colored pipe cleaners work great for the arms. Kids can twist them around for fun and when you hold the car in your hand they wave around, which I find very humorous. I drilled holes for the pipe cleaners using 1/16 inch drill (the smallest I had) and that worked fine. I didn't model the holes since they have to be so small for the pipe cleaners, you'd have to use a probe or drill bit to clear the space anyway. The drilling procedure takes less them 2 minutes. 
If you will need to print 7 hands.

Print Settings

Printer brand:

Prusa

Printer:

i3 MK3

Rafts:

Yes

Supports:

Doesn't Matter

Resolution:

.3mm and .15mm

Infill:

10 to 20 pecent

Filament brand:

Pursament and Matterhackers

Filament color:

Red, Yellow, Blue

Filament material:

PLA, PET, ABS, anything really

Notes:

Any filament will work. I used PLA for the body and ASB for the small parts because I have that on hand. I printed the body in .3mm layer height and 10% fill. I used supports on the main body, but it probably would work without any, All the other parts (except for the hat), I printed at .15mm height, no supports, but with a 2 to 3 layer raft. If you have any problems with the hand fingers printing (I didn't - ABS, PET, and PLA worked well) , just scale it up a bit. It scales well.
The hat can be printed at .2 or .3 mm layer height. I used Prusa Slicer's color change function to swap between red and white. You could always just paint it.

How I Designed This

Design programs

Fusion 360, Blender, MeshMixer, patience