Don't seem to do any harm but go straight through...uuurrrgh.
Split pea daal type stuff is good - soak, then fry diced onions & peppers (add curry paste for adult version), chuck in split peas, cubed sweet potato or butternut squash & simmer till squishy - about 40 minutes.
(I seem to have the sort of weaners who seize fistfuls of just about anything off adults' plates - there's not much that's veggie they haven't eaten )