Zentraedi Fizzy Bath Bombs Neon Colorant Kit Supplies for Kids 3 Pack (30 Tablets) Blue, Orange and Pink

Good motivator for potty training a toddler - we broke up the tablet and placed them in the training potty and made a fuss when the color changed. Granddaughter was trained within 2-weeks.

My daughter thinks these are fascinating. The water becomes a fun color and it doesn't stain the tub. Wash cloths get a little coloring on them but it washes right out.