Lilias, I agree with mbear. but would go a bit further and a few nights a week forget about figuring our what the kids might like and just make stuff that you and DH like and work around that for them. It will be less frustrating for you and you might be surprised at what they will try.
We have never made different meals to us, for our DD. she is not great with veges but we persist and she is getting better.
I do regularly cook meals just for DH and I when I get bored of the basic meals. I made some yummy lamb shanks the other night in the slow cooker. Naturally the kids had nothing to do with it! DH isn't fussed with what he gets to eat though, so he's pretty easy to please! I usually cook meals I feel like when DH isn't home unless DD asks for something which she is occaisionally starting to do.
I don't cook meals especially for the kids either. They get what I cook. I do try to make at least one thing each night they will eat, like we had sausages pumpkin/potato mash and corn on the cob yesterday (sausages and mash at DD's request!). DD ended up only eating the snags, mind you she had 2! DS ate a small cob of fresh corn and 2 bits of sausage. That was it though. But better than usual! Tonight I thought they'd at least eat the pasta, but no luck
Tonight I caved and gave DD some apple and carrot before bed becasue she was crying she was hungry. I tried to convince her to eat her dinner but she was adamant she didn't like it. I try not to make it a regular thing to give them more food every night, but DD went to preschool today and she's often more hungry after that. And when she ate her apple and carrot peices, she told me 'Mmm, mmm, mummy, deeeelicious, all in my tummy!! Now my tummy is happy!' so I think she was pretty geniuine in saying she was hungry!