It's trivial I know, but me and OH disagree.
This morning DS was in the garden when he came across an exhausted bee, he came running in to tell me, because for the past couple of weeks (after a thread I saw on MN) we've been looking out for poorly bees and carrying a little bottle of sugar water around with us in case we find one.
I didn't fancy the bee's chances, and after bringing it in and trying to save it, it died. DS was off playing so I quickly put the bee back outside. DS went to check on it just now and I told him that it got better and flew away, saying that it said it was sorry it couldn't thank him but he had lots of work to do 
OH asked why I didn't just tell him it was dead and thinks it was a good opportunity to show him that these things happen. He is three! He knows that animals die, but I felt kinda bad and didn't want him to be upset that something he'd tried to help save died anyway 
...AIBU?