'What is this, Luna?' Draco asked, looking down at his wife and two-year-old son, who were sitting on the floor. He bent down and picked up a small, brightly-coloured brick to inspect. It had three little round bumps on one side, and holes on the other.
'Lego!' said Scorpius gleefully. 'Lego! Lego! Lego! Leg – '
'That's right,' said Luna, smiling at her small blonde son. She cupped his little pointed face in her hands and kissed him on the nose as he giggled. 'Lego!'
She laughed up at Draco's bemused face. 'It's a Muggle toy that Hermione showed me when we went shopping together in Muggle London, so I got it for Scorpius. It's such fun! Look!'
She scooped up two more little bricks and attached them onto the one Draco was holding, making a little clicking sound. 'You can make houses and buildings and anything else you want. And look at this!' With a flourish, she held up what looked like a tiny doll in a brown hat.
Draco crouched down for a better look, intrigued. 'A little man?'
'Yes, isn't he cute? The box says he's called Johnny Thunder, and he's sort of a Muggle explorer.'
Draco poked the little figure experimentally, but it wouldn't move. Scorpius pulled himself up on tottery baby legs, and staggered to his father, grabbing him round the neck with a beaming smile. 'Dad-dy! Man! Man!'
He reached for the little figure with starfish-splayed hands, and promptly stuffed it in his mouth.
'It's all right,' said Luna, seeing Draco's look, 'They've got an Anti-Swallowing charm on them. I invented it specially!'
When Luna found Draco later that evening, head bent over the table, absorbed in putting together a Lego car, she just slid her arms around his neck and kissed his hair. 'I told you it was fun…'