We went without a bath til DD was 18 months old. was fine - she showered with us. now she has a bath maybe once a fortnight at home - the rest of the time, she showers with us (or by herself with us supervising - we just lean in and wash her hair and make sure she washes the rest herself.

with regard to bath toys, they can still have water play either in a tub outside in summer, or in a small pool...