An ideal present for a baby...

Everyone gathered in the kitchen to admire Wilson's just-finished present for Baby William. 

'It's lovely,' I said. 'Ummm, it's a hat, isn't it — with cute little ear-holes?' 

Wilson's face darkened. 'Obviously not. Guess again', he replied, stonily.

Polly silently mouthed something to me, but I couldn't make out what she was trying to say — Apple? Mammal? Enamel? I took a chance and said, 'It's a mammal!' 

Wilson nodded warily, while Polly burst out, 'Just look at those lovely humps  it's a Bactrian one, isn't it?'

'It's a camel?!' I exclaimed. I thought this sounded more uncertain — disbelieving even — than I'd intended, but it satisfied Wilson.