Sounds like an opportunity to educate your kids, and by proxy, others.

Kid’s bubble-shaming is no different than any other stupid shit kids have always done.

Don’t feed into it.

And if you really want to have some fun, host something like the iMessage-Matrix bridge mentioned above, or other messaging apps. When your kid shows up as a blue bubble, but friends notice he’s on Android, they’ll be confused…another learning opportunity.