My nephew loves to take baths and my neice is a water baby. When they get in the bathtub they both love to play with their toys. My nephew likes to take bubble baths and I so I keep stuff like that at my house in case he is over. I have now found something new that is just like bubble bath but without the bubbles. It is made by Crayola and is called Bath Tints. These are little tablets that you drop in the water and they turn the water the same color as the tablets. The tblets are blue, yellow, red and green but you can mix the tablets to make other colors such as mixing blue and yellow to make green or yellow and red to make orange. These tablets are non toxic so if the water gets in the child's mouth it won't harm them. My sister also uses these at her house and she has told me that it stains her bathtub. I have never had that happen so I can't vouge for that. The label does say that it may stain certain surfaces but I can't say for sure.
I would reccomend this product for anyone that has children who like to play in the bath and want to change it up instead of using bubble bath.