Comeon, I doubt if I will be able to save 2-3k on 8k with 2 school-aged kids. Sure, if I send them to a local primary school I'm sure I can. But I choose not to. (Let's not talk about why I don't want to or shouldn't.)
With kids, the expenses just pile up - enrichment classes, piano lessons, visits to the doctor, new shoes every two-three months (they grow out before you know it), books...
If I ask my wife, she'll be able to come up with some more.
All in all, we probably won't save much for a short holiday somewhere nearby. Unless of course you use your bonus to that.