Boot time < 1 second.
Yes I agree, you have expressed that really rather well. Within a few minutes we had simulated a dice game and I spent much of the day showing her some basic.
We reviewed some other coding sites and they want to teach HTML. I'm not saying this is a bad thing, but teaching a 7 year old BASIC will give immediate gratification, and it's fun.
I was of course delighted with the boot time of around, oooo, 0.5 seconds!