What it takes to be a Hindu?? Who is a "Hindu"??
Is he a man who worships idols, or meditates, or chants names of Hindu deities 16x108 times daily, or the one who is tolerant?
Notice that I am just talking about what a Hindu appears to do on the outside.
Like when someone who wants to recreate a continuous function from discrete samples, you also want to recreate a "Hindu" by sampling as many physical traits, outward appearances of a "Hindu". But believe me, there is NO "sampling theorem" valid for such recreation.
Even if one mugs up all the verses in Upanishads, he can NOT exactly simulate a true "Hindu brainwave". And this is why Hinduism is NOT like Christianity, or Islam. It is NOT a Religion, rather it's a way of life. It's NOT to be "followed word-to-word" either (like what Christian and Muslim scholars do), rather it's to be "absorbed" instead.
So the "definition of religion" is irrelevant here in case of a Hinduism. Many westerners have tried to "define" Hinduism, the same way they defined Abrahamic religions. But they ALL ended up in creating MORE confusion and false interpretations, about it.
A child's brain is mostly plastic. He learns what he sees. Indeed, the "sampling" of traits and habits, that I mentioned earlier, suits an immature mind (of a kid), and not to a grown up.
So first you should ask yourself whether you ARE a real, "mature" Hindu yourself, or Hinduism is just another "good thing" for you. Again, remember that one can NOT just read a bundle of pages and be Hindu.
Frankly, there is NO "prescribed way to do this in any of our literature", nor there can be such a thing. Because in Hinduism, Spiritual transformation of a human occurs ONLY through another human being (whom we call 'Guru') and NOT solely through some DEAD pile of text (which are just tools). All important is an enlightened Guru. And in fact, a Hindu is REALLY HARD to "follow", but is REALLY EASY to "see through".
Let the kid see through you the light of Hinduism.
This one little idea in Hinduism, says that "Whats Outside is JUST a reflection of our inner Self..."
- What is "Outside"? Its the overall perception due to the PRESENT (ONLY) and NOT whats due to the nostalgic memories of PAST, or Dreams and Desires for Future. Actually, Memories and Dreams are nothing but illusions.
- WHO is "Self"? The one who perceives.
So this idea separates the perception from the perceiver. Just like water is a separate from the ripples or currents in it.
Why do people worship idols?
Its root lies in the above mentioned idea itself.
A deep sea fish CAN ONLY notice the current in the water rather than the water itself. Similarly, most beings can only perceive the ripples or currents in their inner Self, rather than the Self itself. And Nashvar materials and the rituals associated with them (apart from mantras), are like "tools" to generate an intense "current" of spirituality in them. Thus making them rise and somehow come closer to the "Self".
I am NOT implying anything like e.g 'the description of Lord Vishnu in Hindu Texts is mere an imagination'. NO!! Rather I am only saying that the means to communicate with Him could be many, and one of them is "through" a Vigrah. Because a Hindu "upasana" itself mean '"sitting" next to' a deity, and its ways could be many.
Interestingly, its not just Hindus , who do that. ALL other religions have their own rituals JUST for the sake of the spiritual ripple.
So worshiping Idols (or hating Idols) is not as narrow as you think. For some its the only way.
Few things for kids:
Make them learn Sanskrit.
Sensor TV, Internet, and any other media.