101 Things You Need to Know (and Some You Don't) by Richard Horne
101 marvellous facts, brilliantly explained: Why do we have nails? Why is the sky blue? Why can birds stand on electric wires and not be electrocuted? Educate your child with minimum effort, and in blissful peace and quiet. The perfect source of fascinating facts for any child who doesn't want to be Boring when they Grow Old.