Crayola Bathtub Fingerpaint soap - Lemon Yellow

I bought my 15-month-old grandson a set of Crayola Bathtub Fingerpaints, which has red, blue, green, pink, & purple, but no yellow!I think it's important for kids to learn how to mix their primary colors: red, blue, yellow to make the secondary colors: orange, green, purple, & brown. So I had to buy a tube of yellow!This tube has more ounces of paint than the ones in the set, so if I had it to do over again, I would've started him out with 3 large tubes of red, blue & yellow before buying other colors.I see there is a Crayola set that has just red, blue, yellow, plus some color tablets to color the bath water. That's a good set to start with.Anyway, my grandson played with these paints in his bath for the 1st time today. His mom made him an artist's pallette of color dabs on the edge of the tub near the wall. She sent me a video to show that he was soooo into it & having soooo much fun she could not get him to turn & look at the camera! These paints are just tooo much fun & so good for creativity & learning!A huge hit!!!