I feel a bit of a weirdo after reading this thread! DS and DD get bathed daily, with DS (age 3) having his hair washed every other day. Even after a rushed and busy day, they still have to have their baths.
They quite like it though, although DS always tries to negotiate not having his hair washed. DD at 8 months doesn't get dirty exactly but I don't like the idea of any yuck that might have got under her chin.
At boarding school we were only allowed 3 baths a week, which I always hated (never liked the idea of getting into bed without washing the day off first), so maybe that's why I'm a bit fastidious about this one thing. Certainly everything else in our house is pretty chaotic!