Roblox Ragdoll Mania: Make your own own Ragdoll and inflict severe suffering on your loved ones as well as on yourself (Image via Roblox) Ragdoll Mania is a Roblox comedy physics simulator game ...

There are lots of free online art tools, and lots of free online physics simulations. There are very few online tools that combine the two ideas, and fewer still that do it as well as Kinetic Sketch.