Children's breakfast cereal and children's video have a lot in common.
Both are segments of large and profitable categories. Both benefit because kids are in the supermarket a lot. Both will soon cost the same if cereal prices keep rising.
Of course, adults don't consider either one a staple of weekly grocery shopping. Their traditional staples are milk, bread, meat and produce. They depend on finding these items in the store. Meanwhile, kids have their own agenda. Breakf