Go to Woolworths (if they still exist by the time this is posted) and you can get a lap-tray (a tray with a beanbag style cushion stapled to the bottom) for £4. Does exactly the same thing, been using it for years. Even has some pretty flowers printed on it.

was going to say the same but got beaten to it! over-engineered response methinks, by ilogicaltech

paris cos she wants to avoid thigh problems