Algodoo

select the sponge box, then in the collisions, turn on no selfcollide, so it doesnt explode in the next steps, then in the script menu, set the hinge constant to NaN, also you might see an axles tab in the sponge block, in the axles tab set the axles to "brake" then set the breaking threshold to whatever you like, and there you go, you have a breakable block, you could take a car image from google then turn it into sponge then apply the steps above to make it crashable.