Baobab trees tend to have a tall skinny trunk with a flat top, but they don't grow that way by accident. That's how players build them!
In the dexterity game Baobab, players are dealt cards at random, and the tree trunk is placed in the middle of the table. On a turn, a player announces that they'll play 1-3 cards, then they turn the cards over from their deck one by one, placing them on the tree as required by what's depicted on the card.
If any cards fall off the tree while you're adding something to it, then you place those cards (and any cards that you've yet to place that turn) in a personal penalty pile. As soon as someone places their final card, the game ends. Players count the cards remaining in their deck with those in their penalty pile, and whoever has the fewest cards wins!