My Mum is a Superhero (NE)

Milo's mum always knows what he's up to. She knows when he's usingher saucepans to brew up magic spells, and she knows when he'sbouncing on his bed. But how does she do it? There can only be oneanswer: she must have X-RAY VISION! So one day Milo decides toput his theory to the test...