Falcor
How about International Icon Tarot? I think it wont be considered as nudity...
Er - Star ? World ? Devil....Most Marseille decks could be used....
The happy tarot does have some nudity on the judgement card but it's not "sexy nudity"The Happy Tarot, Wild Unknown, Idiosyncradeck, Animal Totem Tarot, Animal Wisdom Tarot, Delos Tarot (cartoony RWS clone), Housewives Tarot, Zombie Tarot (the lovers card has modest undergarments), and there are many many more.
Silhouette tarot should be re-releasing soon, there's ArCanis on kickstarter, as well as the Brady tarot releasing late 2017, Revelations is no nudity unless you count shirtless mer-men, and I believe both the 78 tarot Nautical and Carnival are no-nudity.
Raven's prophecy is a nice deck, but dark. Any lenormand deck should be pretty safe (just check the man and woman cards).
I haven't used it yet, but shadowscapes maybe?? And any deck suited for a child under 13 (i.e. color your own deck?)
Prisma Visions should also be ok if memory serves...
It just depends on what they have to spend, I suppose.