We also have 2 children (1.5 and almost 4) and last year we moved into a newly renovated apartment with supposedly "high-quality" prefinished parquet. We don't know how expensive it was, but after one year it already looks quite worn. Dents, scratches, and so on everywhere (that will probably be fun with the landlord when we move out soon... but we treated it quite normally!). The children really put it through its paces and that can't be avoided. They drop their wooden toys on it, sometimes drop a plate from the table, and such things. We will sand and reseal the existing strip parquet ourselves in the house and lay rather inexpensive click vinyl in the other rooms (I guess around 20-25€/m2). Specifically because of the children, who would probably ruin any expensive floor within a few years anyway.
We personally take the stance: as long as the children are small and destructive, it's better to install inexpensive material and then, once they have become more reasonable later on, lay something "real". And who knows, maybe the cheap parquet/laminate will hold up better than previously expected?