Harrods Xmas grotto question

[LittleMissLady]

Hello,

I know I'm early but these slots book up so fast!

Does anyone know what is different about the preschooler visit to the classic visit?
My dd is 3, will be 3.6 by dec and I would rather take her in December (I think Xmas should be confined to December!!) then in November but harrods advise taking under 4's in November.
Is it just cos it will be mayhem in December?

Tia smile