Tadpoles do not develop simultaneously – and neither do humans
In our world things often reach a point where all you want to do is turn your head and look away. But, fortunately, plenty of short films for children actually do deal with those issues. The current trend is: take a closer look where it hurts, and where the protagonists never give up. One example is Nils Hedinger’s KUAP, about a tadpole who somehow misses out on becoming a frog and is left behind.