I started my kids with the "kids" rods, and noticed the trouble they had with them right away. Just try using one yourself....its not easy to fish with shoddy equipment. I ended up getting them decent set ups at an early age, because it made it a lot easier for them. They're smart, they'll figure it out quick.
There arent many things more exciting to a child than catching a fish. Once the seed is planted, it grows like wildfire.
S.