You can search using the 'kids recipe' and 'tiffin recipe' tag. Here's a nice one that you can make.
Give them different fooda every day. Rice preparation like masoor rice, vege and sprouts sandwiches, vege dhokala ( daal should be mix daal) , sabudana khichadi , paneer paratha, daal paratha, gujarati muthia. Vege idali, poha with veges and sprouts added. Sometimes cheese sandwiches also you can give. Egg bhuraji also is a good option. I have posted vege and rice cutlet and daliya cutlet. You can go through the recepie