You mean they don't eat the parathas and pulavs made with palak or methi? You can try methi muthias, palak pakodas and also palak chat... Where you deep fry palak leaves dipped in besan ... and use them as base for various chaats
You can make changes according to taste of your kids. Can make gravy of normal manchurian.
You can make it vege. And replace pasta of your kids choice.
Palak u can put in chicken ,mutton curries. Make omlette with palak. Methi,make vadas or pakodas. Spinach, u can make rice as u make rice noodles.