These colorful cups will keep your child happy in the bath for a long time. These cups have different holes on the bottom of them and will make different patterns when filled with water. I love that they teach my child coordination and development of their senses as they pour water in and out of the cups. Each cup also has a different shape on the bottom of it,so great for shape recognition. Your little one will have so much fun with these Nuby Splish Splash Stacking Cups in the bath,you might just be able to relax with a book near the tub. The cups are also BPA free,a big plus for parents!