Put your game on pause and focus on a spot where mushrooms appear (the top near the graveyard and cactus is a good spot...) When a mushroom appears quickly put Kiki on it and unpause the game. She'll take it to the food bin.
When you've done this 3-4 times, she'll have enough to supply her for a while and you can let the game run for a bit so that she'll age.
In my game where I had only one child, Cheop was 12 when I found him, so I didn't have long before he could start foraging and farming on his own. He is now 23 and waiting for an event that will bring another villager to keep him company. (So far I've only had a crate with more food and the bad monkey who stole Tech points...)
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Red Sox--2007 World Champions!
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Isola is a magic island! All sorts of strange things can happen, and often do happen. -- arnie