Cathy - I can relate to your problem. I have a herd of grandkids.
Amazingly, the middle daughter's husband and their kids, will eat
anything that hasn't hit the floor yet. . .The poor dog feels left
out, when they are around.

However, my youngest daughter's husband, and their kids are the
pickiest eaters I've ever seen. Just about everything must come out
of a can, a box, and be "un-messed" with.

We will be together this weekend,and it's gonna be a lunch meat, hot
dog, potato chip weekend. The kids won't eat deviled eggs, potato
salad, or anything that has mayonaise or mustard. I have made some
baked beans, but I've been really careful to not make them too
"exotic."

I have the same fears you do, about taste development. . .I do know
that when my 10 year old grandson was a baby, I baby sat him, and made
all his food. During that time, he loved most anything I made for
him, but he has been prejudiced by his dad, and all those things he
ate as an infant, he won't touch today.

Good luck to you!

Myrl Jeffcoat
http://www.myrljeffcoat.com