Elliot's really into growing things lately, so we got him some kits for his birthday to grow cattails and lily pads for the pond, and also some sea monkeys. Today was day 5, feeding day for the little guys. In his haste to feed them, he dumped in the whole packet of food at once. I'm afraid the poor guys were OD'd on food :( He wants replacements...so my question is: What do you do with these things/how long do they live/etc. before I commit to them once and for all?