I don't separate it out, but each month I budget £50 to spend on LO (clothes, toys, bibs etc) and I save a couple of hundred quid which is going towards paying my bills (food, petrol, phone etc) when my maternity pay stops in December. Although the money isn't being spent directly on her, I like to think she benefits from having me at home for a few extra months.
ETA - we get £160 a month in CTC and CB
ETA - we get £160 a month in CTC and CB