2tired... Does it matter what I think? Really? If you really want to know, I think it's incredibly sad that some parents/mothers/fathers/whatever cannot bear not to involve their children in everything that goes on in life. There seems to be so few boundaries between kid-stuff and adult-stuff.
I don't think it's appropriate to send valentine cards to your children - or anybody elses. Valentines Day - apart from being a huge commercial opportunity to be milked - is about romantic love. I think it's for non-attached people but it's definitely for adults, not children.
It really seems to be that everybody wants to muscle in on it, they can't let days traditionally set aside for a certain group (unattached singles) be left for them. Not only that, there needs to be a huge fuss about valentines for partners with the attending 'grief' if the wrong chocolates or wrong-size lingerie is purchased by the errant MAN (and it is ALWAYS the men who are criticised - many women seem to do nothing yet expect the moon on a stick). Then, to put the tin lid on it - the children have to be involved because... well, because they can't be 'left out', told 'no' or just explained to, they must be pandered to forthwith! I think it's the parents who generally insist on the pandering, not the children and, if you are a 'traditionalist', you find it creepy and irksome because it's not about parental love and never was.
The 'day', such as it was has been well and truly bastardised to take account of the wants of Joe Public who is absolutely entitled to grab and dilute every occasion for themselves, no matter how inappropriate. I remember my gran/granddad saying something like, 'Oh let's leave that to the youngsters'. I can't remember the context but it was right - they didn't want to change the atmosphere/expectation of something. I doubt whether you'd hear it now. It's all 'anything goes' and we're entitled to do whatever we want because we want to.
I could take offence that you think my view is 'sad on so many levels' but I don't, I accept it as your opinion, which I don't share. Each to their own as somebody wisely posted upthread.