DS is 4 and dd 9months. I recently started doing this as it was about the only thing they can do together. My friend saw and said she would for two boys or two girls but not one of each my reaction was to look at her like this .
She also said it was unhygenic to be mixing their dirt and germs which again I thought . And said surely they have each others germs.
But I am now wondering if other people think it is weird and if not what age should I stop doing this.