Our kids are now almost 13 and just turned 10. They are both doing pretty well. I could relate to what you were saying about your 18mth. When we brought our son home, even though he was 3 1/2 he said very few words, wasn't potty trained, didn't know how to use a fork or spoon, lot's of way in which he simply wasn't taught.
The bad thing is, he had been in foster care since he was 17months. We adopted him from Oregon, and believe me, Steve and I really reamed them about the "care" he got. What really, to this day, makes me upset is that his schedule was: Up at 7:00am. Nap from Noon until 4:00. Bed at 7:00pm. His bed was a crib with a locked lid, which I call a cage, wouldn't you? So, this healthy 3 year old boy was essentially caged for 16 hours a day. The foster "mother" took all sheets and pillows out of the cage, and he was literally tied into pajamas and given a rubber bath toy to play with. She said she did this because if she didn't he would rip the sheets up, pull the stuffing out of any plush toy and strip out of his clothes. She was worried that he had some serious developmental issues. I suggested that maybe, just maybe
HE WAS BORED OUT OF HIS SKULL, YA THINK!!!! :mad
ok, then, all better now. :gah
Anyway, he is doing just fine now. It didn't take him long to catch up and now he's a great student and all around good guy. It's funny, he never used to talk and now the biggest discipline problem we have with him is that he talks too much at school with his buddies.
But, yes, yes, yes, there is an overwhelming need for loving Christians to look to their hearts to take in foster kids. Sometimes the alternatives for the poor babies aren't too good.
Our daughter has more serious issues. She was just 2 1/2 when she was removed from her home, but she had a younger brother and a younger sister, and all three kids were within a year of each other. But, since the mom was very low functioning, and the dad was ( :bigfrown )...let's just leave it at that...our daughter was basically the parent for the little ones. When the police came to take the kids away, she hid the baby in the closet under some stuffed toys and she pushed her little brother under the bed and laid in front of him to try to protect them. When they were taken away, they were sent to different foster care homes, and it affected her profoundly. We tried are best to adopt all three, but the state decided that the little ones were better off in the foster homes they had, as their foster parents wanted to adopt them. Our daughter, acting out because of all the losses and chaos, had been bounced around to different homes, so that we were her 5th home in life. 5 homes in 3 1/2 years. She's really overcoming all of it, but it's needed a lot of patience, love, understanding, and some professional counseling. And Ibuprofen. And sometimes Scotch. Aww, just kidding, just kidding,

(seriously, I don't drink). Really, for all the ups and downs, both of them are the most awesome blessings in the world, and I still am amazed that God brought them to us.