Boba Mahjong is a two player only set collection card game designed by Ta-Te Wu that features cute artwork from Holly Chui better known as tinyholls.
This game is part of a series of Mahjong based games. The chain started with Tien Zi Que from Ta-Te Wu in 2009, which was itself re-implemented into The Battle of Red Cliffs, a one to nine player version which Ta-Te Wu designed along with E. R. Burgess back in 2009.
Finally, the game was converted back to a two player game in its current form of Boba Mahjong. Besides changes to player count, the mechanisms in the game have also changed with each iteration.
A game of Boba Mahjong plays in about half an hour and the box recommends the game for ages 10+ but I would say you could probably play this with younger kids as there isn’t any reading required and the game concepts are not that complex.