I don't think judo is a bad idea for kids! But you did say originally that you thought aikido for kids just turned into judo.
Quibble: That is not quite what I said. I said if you modify Aikido to make it suitable for kids (e.g. by taking out the the esoteric stuff and the twisting of small joints and introduce more lively, playground like roughhouse randori), you end up with something similar to judo, so why not do the real thing.