Oh, oh oh!
Fabulous thing to do: questionaut. Must show it to Bumblebee this evening...
Postscript: now that I've had a quiet moment (catching my breath after class) and looked at this properly, I HIGHLY recommend you go in and have a play. It takes about 20 minutes (as an adult, anyway), it's a lovely quiz on all sorts of subjects that needs attention and intelligence and it has gorgeous animation. I'm looking forward to sitting beside B while he tries to work out what's going on; I think he'll be fine with the little playful intro bits for each section but I'll have to help him with the quiz questions. I was a bit slow with the maths and science questions, but the language questions are ace.
Go on-- have a go, it's very beautiful.
Post-postscript: Din put me on to more by this design[er? team?]: Samarost. These things are the most magnificent and seductive brain teasers.
(thanks to Ample Sanity for this)