What to do if your 4yr old and 2yr old ate more than 20 of there gummy bear vitamins? each one containing 200iu

Need more info: They are probably fine unless they contain a lot of iron- too much iron can be hazardous. Nothing else in them should cause acute toxicity. Obviously you need to keep these vitamins out of reach so this does not happen again! if you repost with the exact brand i can tell you more. See http://www.Chop.Edu/service/poison-control-center/tox-talk/iron-poisoning.Html.