A good question, but me and my wife don't plan to have kids. Nevertheless, IIRC, if either of the parent/grandparent was an Indian at any point of time, the kid

A good question, but me and my wife don't plan to have kids. Nevertheless, IIRC, if either of the parent/grandparent was an Indian at any point of time, the kids have the option to apply for Indian citizenship. Though I would have to recheck the rules to confirm. The flip side is they would have to give up whatever other citizenship they have but again they also get the OCI if they want to.