"Thanks for letting me come hang, great kid!" tweeted Long, who included a Twitpic.
"He wanted to spend a day with the family and asked about Saturday," Oyston said. "We told him it was our daughter's birthday party at Chuck E. Cheese, and he was more than welcome to come. He told us it was fine, and he was totally down for some Chuck E. Cheese.
"Andrew didn't know too much about Kyle Long at first, obviously, and we told him and he didn't believe us. It took a couple of days for it to sink in that somebody from the Bears was coming to talk to him, so he started reading up on Kyle and his background. He was very excited to learn about Kyle. But on Saturday, he was nervous."
Long did not disappoint at the party.
"Kyle was amazing with the kids," Oyston said. "He was playing games with all of them and following them around. He took pictures with my daughter. Andrew and he even held our 16-month-old son. It was really amazing.
"He came back to the house for a little bit after the party and signed some pictures. He even asked the kids if they wanted to go outside in the backyard and throw the football around. That was the kids' favorite part: playing catch with Kyle. Running around and throwing the football with him, the kids thought that was just amazing. All day yesterday my kids were outside playing catch and pretending they were Kyle Long."
Long called Andrew's sister "a firecracker."
"I'm surprised she doesn't stand up and beat up all the bullies. She's a tough little girl," he said.
"There was no point and time when we sat down and had a serious conversation," Long said of Andrew. "He just needed somebody to hang out with and have a strong male presence, like an older brother-type deal. If that's the role that needs to be played, I have no problem with that. He's a really great kid.
"It's always fun to have a little brother," Long said, adding that he "absolutely" will stay in touch with the family.