I knew I should have listened to DH, although I am not going to admit this to him

At the weekend we were having a mooch around the charity shops in town and the DD's saw this little handheld TV thing, the ones where the picture rolls across the screen. It is a Fifi one and has the most annoying sing song voice singing the Fifi theme tune. My niece has one and I understand now why my brother and SIL have sent it to my parents for when the kids are there.
Both the DD's were ecstatic at finding it and as it was only £1 I bought them it, much to DH's amusement. He predicted that I would be sick of it within the week, he is right
How very dare he 
Would I be a terrible mum to remove the batteries later once DD1 is at school and DD2 is napping??