That's probably just as well. He adds single digit numbers correctly, but he doesn't do decimals well at all.
The remarkably entertaining part came at bedtime, when The Wife was handling Little Bear and The Baby while I was handling The Boy. I crawled into his side of his bed, he sat where I normally do. I put my head on his chest, stuck my thumb in my mouth, and let him read to some some "Elephant and Piggie" books by Mo Willems. He did really, really well; while there is a significant amount of memory-reading, he does recognize words and is able to correct himself as he's going along. He read three whole books to me, with no uncorrected reading mistakes! Afterwards, we switched back to normal sides, and watched "The Night Kitchen." Granted, he took a solid hour to fall asleep, which included four trips to the bathroom or to get water or to read. When he was ready for me to go, he said, "Okay, now I'll be The Boy again, and you can be Daddy."
We had a marvelous 90 minutes outside last night. In Pittsburgh, right now, we're enjoying a week of sun and high 70's temperatures. It's marvelous. We went outside after dinner and played for a long, long time while Mom was teaching her lesson. The most fun part was the taking turns for piggyback rides: I'd sit at the end of the slide, a boy would slide down the slide and grab on, and we would run around the yard and back to the slide ladder. Then the next boy got his turn. The Boy also drew a very nice picture for me, which he labeled "For The Boy, From Daddy," because he was Daddy at that point and I was The Boy.
Tonight, we're having dinner at a friend's house. This particular friend is a classmate of The Boy's, and they are moving into a house right around the corner from Grandma's house. This kid also loves Batman, almost as much as The Boy does. That's pretty cool. Apparently, they play Batman and Robin at school together, with some of the other kids being bad guys.
Gave The Boy a pop quiz this morning: name 3 members of the Legion of Doom from the 1970's Superfriends cartoon. He named Luthor, Gorilla Grod, and Toyman. That's pretty good.