user19338: 
Vesak Day is coming, some monastery offering a baby bathing during the event.
What is the story behind about this? Is it appropriate?

user23677: I think it is a very ignorant thing to do but not particularly offensive to me.
#1 Buddha isn't a baby, nor is it a name, thus washing 'baby-buddha' makes no doctrinal sense. As a matter of fact the Buddha never was a baby and a baby can't attain Buddhahood.
#2 The earliest statues & depictions of the Buddha do not appear until several hundreds of years after Parinibbana. The Sarvastivadin Vinaya even claims that the Buddha specifically forbid making of his images but allowed depicting the Bodhisatta.
The common view is that making statues of the Buddha is inappropriate and that is why the earliest art depicts things like a footprint of the Buddha rather than The Buddha himself.

user471: The Buddha himself discouraged focusing on his form and instead recommended to focus on the teachings (Dhamma).

Vakkali: “For a long time, venerable sir, I have wanted to come to see the
Blessed One, but I haven’t been fit enough to do so.”
Buddha: “Enough, Vakkali! Why do you want to see this foul body?
One who sees
the Dhamma sees me; one who sees me sees the Dhamma. For in seeing the
Dhamma, Vakkali, one sees me; and in seeing me, one sees the Dhamma.
SN 22.87

On the other hand, some minor texts rebuke the criticism of relics worship. However, I would give more importance to the words of the Buddha, compared to the words of a random ghost.

Ghost:
In the city of Rajagaha I was an extremely wealthy person. One day my
wife, daughter, and daughter-in-law were ready to go to worship a
stupa that held relics of the Buddha. They had prepared lotus flowers,
garlands made of flowers, and incense. I stopped them from going
there. That was the evil deed I did.
There are about eighty-six thousand ghosts here suffering each in
their own way. They all committed the same evil deed of insulting the
worshipping of the Buddha’s relics. We are suffering intensely in this
ghost world as if we were in hell.
If one criticizes worshipping the relics of the Supreme Buddha, that
person loses a great meritorious opportunity.
Petavatthu 35 (part of Khuddaka Nikaya)


19338: <p><a href="https://i.stack.imgur.com/pTo5P.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pTo5P.png" alt="enter image description here" /></a></p>
<p>Vesak Day is coming, some monastery offering a baby bathing during the event.</p>
<p>What is the story behind about this? Is it appropriate?</p>
 23677: <p>I think it is a very ignorant thing to do but not particularly offensive to me.</p>
<p>#1 Buddha isn't a baby, nor is it a name, thus washing 'baby-buddha' makes no doctrinal sense. As a matter of fact the Buddha never was a baby and a baby can't attain Buddhahood.</p>
<p>#2 The earliest statues &amp; depictions of the Buddha do not appear until several hundreds of years after Parinibbana. The Sarvastivadin Vinaya even claims that the Buddha specifically forbid making of his images but allowed depicting the Bodhisatta.</p>
<p>The common view is that making statues of the Buddha is inappropriate and that is why the earliest art depicts things like a footprint of the Buddha rather than The Buddha himself.</p>
 471: <p>The Buddha himself discouraged focusing on his form and instead recommended to focus on the teachings (Dhamma).</p>
<blockquote>
<p>Vakkali: “For a long time, venerable sir, I have wanted to come to see the
Blessed One, but I haven’t been fit enough to do so.”</p>
<p>Buddha: “Enough, Vakkali! Why do you want to see this foul body?
One who sees
the Dhamma sees me; one who sees me sees the Dhamma. For in seeing the
Dhamma, Vakkali, one sees me; and in seeing me, one sees the Dhamma.<br />
<a href="https://suttacentral.net/sn22.87/en/bodhi" rel="nofollow noreferrer">SN 22.87</a></p>
</blockquote>
<p>On the other hand, some minor texts rebuke the criticism of relics worship. However, I would give more importance to the words of the Buddha, compared to the words of a random ghost.</p>
<blockquote>
<p>Ghost:<br />
In the city of Rajagaha I was an extremely wealthy person. One day my
wife, daughter, and daughter-in-law were ready to go to worship a
stupa that held relics of the Buddha. They had prepared lotus flowers,
garlands made of flowers, and incense. I stopped them from going
there. That was the evil deed I did.</p>
<p>There are about eighty-six thousand ghosts here suffering each in
their own way. They all committed the same evil deed of insulting the
worshipping of the Buddha’s relics. We are suffering intensely in this
ghost world as if we were in hell.</p>
<p>If one criticizes worshipping the relics of the Supreme Buddha, that
person loses a great meritorious opportunity.<br />
<a href="https://suttacentral.net/pv35/en/kiribathgoda" rel="nofollow noreferrer">Petavatthu 35</a> (part of Khuddaka Nikaya)</p>
</blockquote>
