We are using Ironkids Omega-3's. Here's the webite:

http://www.iron-kids.com/products.aspx

It is a Canadian product, so maybe not available in the US. Each gummie has 100 mg fish oil, which includes 20 mg DHA and 10 mg EPA. He takes 9 per day. They are all different colours/flavours in one bottle -- some do have a strawberry/banana flavour! The colours and flavours are natural. They do contain both gelatin and fish oil, so not good for a vegetarian. With both boys taking them, its about $15 per week in gummies!

We sometimes have the "up all night" problem too, and I was starting to look into Melatonin, but thought I'd ask the pediatrician first.