It helps with playing and washing.. it doesn’t come out easily from the joints, but okay, it’s not a problem..

Like crayons for the bath. Children under 4 can't open it by themselves (they need to press and slide the white button).
The red from the bathtub porcelain still hasn't come off in some spots.

Expected performance for colors that paint bathtubs/tiles. They come off very easily. User-friendly for children's hands. All good!

I also got carried away and bought these colors for the bathroom, which are not of the best quality. Half of them don't even show up on light tiles. However, the problem is that the child, while painting the tile, learns that with the same logic, they can also paint the walls. That's why I consider it a mistake as an idea, in my opinion.

The little one writes on the bathtub and bathroom tiles. The color comes off very easily with a wet cloth. The color also comes off easily from the cloth and hands.

Not all markers write with the same intensity. The green and yellow ones don't show up at all on the tile. However, at least the child is entertained for a little while in the bathroom and the color does come off easily afterwards.