It's the paints that are washable. Tempera type, think that's how it's spelt
I’ve just always used the kid friendly washable paint. I think it just says 3+ because of them putting things in their mouth but not positive. I’ve never had problems when using the kids washable paint and my daughter paints herself 😅
I used the Crayola washable paints
Replying because i would like to know as well