I would say some toad species. Maybe spadefoot?
Wingless fruit flies are great for now, just be sure to dust them with a vitamin and calcium supplement every day (you can rotate) that is less than 6 months old (oxygen breaks down the minerals). Eventually you can move up to Hydei fruit flies or pinhead crickets. Bean Beetles are also a good variety food source, but the cultures only bloom about once a month and last only a week or so.
Very cute. I love toads.