on my lap with my laptop

We just got back tonight from Chris' cousin's house - a nice family birthday party, where the kids had a lot of fun - but ate way too much sugar, so Liam konked out on the way back. We returned around 6pm, and he was not happy to have to wake up. I didn't do hardly any work this week-end (boy, did I ever need a break), so I was at my laptop trying to get back to the grind. One of the things Liam (and Kalian) likes to do lately is type his name on my laptop - I think it's fun for him, but he also knows I'll cave and hang out with him. After he did this a few times, he was just sitting on my lap cuddling - he usually sits on my lap while he types. Anyway, he said,
"Mommy, will you come play with me? Let's go build!"

"I'm sorry, sweetie, I really have to work tonight."

"But, Mommy, you can bring your computer."

"Uh, oh, that's nice of you to offer, but I don't think that will work."

His brain was really working now.

"But Mommy, we need your computer to look up directions on how to build."