Kids 18 and under are always free--though they do require a ticket.

Experience the looming curves of Richard Serra's Sequence sculpture (Floor 1, Atrium).

Get moving with Alexander Calder: Scaling Up (Floor 3).

Count all 21 native plant species on the largest living wall in the United States (Floor 3).

Reimagine what a self-portrait can be in the Photography Interpretive Gallery (Floor 3).

Soak up some eye-popping Pop art from the Doris and Donald Fisher Collection (Floor 5).

Grab lunch at family-friendly Cafe 5, soak up the sun in the sculpture garden, and get an up-close look at SFMOMA's rippling exterior (Floor 5).

Check out the amazing selection of kid-friendly items in the Museum Store on your way out (Floors 1 and 2).