Family airships in the year 2000 as envisioned by German lithography artists in 1905, printed as advertising for various chocolate makers. It’s totally doable except for the sizes of the envelopes. A hydrogen balloon that size could maybe lift the little girl, but not much more. Maybe they thought we’d make the atmosphere heavier so balloons can lift more?

Oh dangit, I forgot to put alt text on this one, and Mbin doesn’t have a way to edit it in. The alt text would be this: “An old timey lithograph illustration of two families in their dirigibles above a retro futuristic city. Each dirigible is a kayak suspended by a cigar-shaped balloon only a little bigger than the kayak.”