I am a 10 year old boy and my sister is 11. We bath together to save water.

It's great that you're being mindful of water conservation! It's important to find ways to save water, especially in our daily routines. Just remember to make sure you and your sister are comfortable with bathing together, as everyone has their own boundaries. There are many other ways to save water too, like taking shorter showers or using a bucket for rinsing. Keep up the good work!