I would still go by the 1/2 your body weight in oz of water as a minimum per day. The amount of water you need is largely dependent on your size - a baby needs less than a 2yo needs less than a 10yo, etc. 1/2 weight is oz is a good starting place. If they are super actively they will probably drink more. If its a lazy day at the house, the minimum probably would suffice.
at 2:56 PM on Dec. 28, 2012