Oops.

Older Son: Does ‘mess’ start with an ‘s’?
me: No, an ‘m’.
Older Son (laughing): Does ‘tidy’ start with a ‘y’?
me (slightly suspicious): No, a ‘t’.
Older Son (in his cheekiest tone): Does ‘biscuit’ start with a ‘nic’?
me: No.
Older Son: Does ‘lorry’ start with an ‘r’?
me (exasperated): Yes.
Older Son (in completely serious tone): See, sometimes I get it right -first time-.