I have a perfect "punishment": No more church. Why? Church is a waste of time that could have been used to play and learn.
Rather, if fully integrated learning is encouraged, it will do more long-term good than any religious service. These services offer only the story about how God created the Original Sin problem (of course blaming poor Satan for it), and then presenting a "solution" to that problem. Of course, in order to benefit from that "solution", you need to obey the leaders of whatever church is presenting this. What they don't say is that no one is ever good enough for "salvation". And, if you do not obey, you will die at Judgment Day or go to hell and burn forever--scaring children into remaining in their churches forever (or until they die). All religions share this problem!
Naturally, when you force a child to read a belief system that contradicts itself, it is going to not only be inherently difficult for this child to learn, but is going to be unpleasant. It will force these children to suppress intelligence--for instance, upon closer examination of Genesis 1-3, I have realized that God intended to impose a tyranny by preventing us from deciding what is good and bad. From there, other self-serving rules would have followed (this is one of the first steps in any tyranny--suppressing the right to decide for oneself what is good and bad based on objective reality). Satan, assigned to guard mankind, stepped in and protected us from that tyranny. Upon which God imposed His death sentence on mankind and the stagnation and hardships that they face--all for seeking freedom to do what is good for themselves and society! Is this the kind of God any child wants to worship?
As for me, I have always gotten more out of a science book than I ever did at church. In school (and especially in the lower grades), I always went through my math and science books like these churches expect members to go through the Bible. So, perhaps, in lieu of church, I suggest getting a nice, difficult (that is, advanced and not disjointed) book on math and science. Discussing that during what would have been church time (and doing the experiments noted therein to go along with the text, to reinforce learning) will prove beneficial. All the children, not just the one that took the car, should be in on this. That will help them to learn how the world really works, plus help them in math and science in school.
Yes, some of the equipment will be fairly expensive. But, it is cheaper than hospital bills and higher insurance costs from having the car driven by a child this age to get out of going to a church that is going to damage their intelligence anyway.
