With apologies to all the nonnas out there, these actually aren’t arancini, the Italian fried rice balls popular in the south of the country; they’re actually more like bolinhos de arroz, a rice fritter or croquette from Brazil that’s a kissing cousin to the holy Italian trinity of rice, cheese, and a deep fryer. (Ours, mind you, are to be cooked in an air fryer.)
Whatever the origin, the genius of the recipe isn’t so much what is or isn’t in it, but what you can get rid of–i.e., whatever you have left over in your fridge or pantry. Rice from weekend takeout? The core of the dish! Baby carrots your toddler won’t touch? A surprise vegetable! Some shredded or grated cheese that wouldn’t be enough to fill a quesadilla? Get it in there! There are dishes that taste good, and then there are ones that actually help you; this one is both.
If you made your pieces small enough, your toddler should be able to hold and eat them with ease, if not pop them directly into his/her mouth. These taste like the corners of a grilled cheese sandwich, so no need to offer condiments unless requested.
If your child really loves cheese and/or is repelled by the site of anything green, omit the seaweed. You can also swap the carrots out for other vegetables–say, broccoli or zucchini--without needing to change the proportions or cooking process.