More to explore:
Bubble bath paint for the kiddos -- just mix baby bubble bath with cornstarch and food colouring and your kids will play in the tub forever! And you don't have to worry about them painting themselves you can make this with gentle, tear-free, baby wash. It only takes minutes to make too, which is always a bonus. Don’t worry about this staining your tub walls either, another BIG bonus.
Homemade bath paints
Toddler Homemade Bubble Bath Paint
good website for kids crafts!