When it comes to protein and B vitamins, beef is a hard meat to beat. The same goes for niacin, zinc and iron, minerals that all growing bodies need. Like eggs, beef is also a great way to get some brain-developing choline into your system, more so than any other meat. That cholesterol and fat that adults try to avoid is actually good for young kids and their developing bodies and brains. Once they grow into pre-teen years you may want to go with leaner cuts of beef. Include beef in casseroles with vegetables for a balanced meal. Hamburgers and small cuts of steak are also an option, but you'll have to do the cutting. Another good way to pair beef with vegetables is by grilling kabobs, a method of preparation your children might enjoy.