Was in my local Sainsburys and spotted big reductions on these.
The smaller single engines like Toby,Percy etc.were £3 and the two part engine and tender sets like Edward and Henry were down to £5.
They have a button which when pressed cycles through sayings and sound effects and lights the lamp.
They also make chugging noises when wheeled along and my Thomas obsessed 2yo will love them.
To give you an idea of how good a deal this is the standard non light and sound singles are usually £5-6 (the pic of Toby was pinched from Amazon where hes 8 quid) and the doubles up to a tenner.
I'll get a pic up later.