Another Bauhaus and bike tour?
Some of the original Bauhaus Weimar teachers founded HfG after the war: a a design "university" which ran for about 15 years . One goal was social responsibility in the postwar times ( design for the every man). The Luftanza logo was developed there also the icons representing Olympic sports.
Biking is easy along the Danube but can be a crowded.
If you find the stone age artifacts in the Ulm museum interesting, rather than following the Danube east, go west along the former Danube riverbed (during the ice age) toward Blaubeuren and Scheklingen. Highlights: a small but very interesting prehistoric museum , pretty views of the limestone cliffs in the Alb and many caves inhabited 40,000 years ago.
(The Unesco heritage cave near Scheklingen may still be closed to visitors due to Covid19: it has one narrow opening where social distancing is not possible)