is it really important to give exotic foods such as kale and broccoli to kids or can giving more desi foods such as spinach and lauki also be good enough?

See.... Every food has its own nutritional value.... Broccoli is a very good anti oxidant and do is kale... Spinach is rich in iron... So you cannot substitute one for another. I feel that it is always good to give seasonal vegetables and fruits to kids....then no matter it is the season if broccoli or spinach. Give all fresh vegetables and fruits to your children but make sure they are washed well and cooked well.