Teach them how to write their own. Don't teach your kid how to use a computer program, teach them how to write one. You can easily build a toy language model

Teach them how to write their own. Don't teach your kid how to use a computer program, teach them how to write one. You can easily build a toy language model yourself, it will give your kid a massive head start and help structure their mental models for life so they don't view this as 'magic' like so many other people do.