With such a tiny pond I would cut out the middle man (forage fish) and stock something that will make good use of the tadpoles, aquatic insects and terrestrial insects. Growth will not be some thing to brag about but can still provide good fun for kids. Black basses and Warmouth will eat even Bull Frog tadpoles but latter will be inclined to stunt. If they can be found, the black bass I suggest is the Spotted Bass assuming you can find a supplier.
See if you can find orginal article that goes with this link.
http://www.jstor.org/stable/3796633?seq=1#page_scan_tab_contentsLatter does not agree so consider.
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.509.5312&rep=rep1&type=pdfAs kids, my brother and I used to create a range of bass fish assemblages in our roughly 1 dozen farm ponds (not legal) where fish were sourced from stream draining farm. Spotted Bass gave the most fish that could bend your pole during harvest and where not as inclined to over populate when alone. Recruitment was not good when other sunfish were present. Later observations working with Spotted Bass indicated to me the parental males do not stay with fry long enough for them to get big enough to beat larger hungry sunfish. Largemouth Bass males do.
