Wobbly teeth

Sitting on the top of the stairs, when he's sneaked out of bed, Oliver asks me:
'I think I've got a wobbly tooth Mama. I've been waiting for a reeeeaaallly long time. Can we build a paper case for in my bed so I don't lose it when it falls out?'. 
There are no wobbly teeth, or any remote signs of wobbly teeth. I didn't have the heart to tell him.