re: Beginner investors. My 2 teen kids.

Can't speak to others re "youth plans", but Fidelity has a pretty good web site and trading tool - Market Pro. But, I would look at what Schwab has to offer before making a decision. Both offer fractional share trading which allows them to invest small amounts to learn. I'd give the edge to Fidelity on that, but the edge to Schwab overall.

Also, buy them a book each year for birthday... something like "A Random Walk Down Wall Street" ... and then one with a different view point so they can learn and decide on their own over time.

... Glad they are interested early.