The cards are cute. But, in all honesty, they'll get looked at for about 3 seconds and, promptly forgotten by their recipients.
What won't be forgotten is the time you spent with your child. The two of you now have a funny story, Lemontine, that will get re-primed every time he hears the word "Valentine" for the rest of his life (so, at least once a year). That memory will trigger all the emotions attached to the experience, and a recollection of the interaction that caused them.
Seems like you just had a pretty wonderful Valentine's Day.
So true! We really had lots of fun crafting them.