You could make a cloud chamber and see particles from outer space. You could write in runes, or study ancient seeds and pollen. You could try a Raspberry Pi or learn about life in polar extremes or on alien worlds.
You could make a constellation chart, a molecule or a plastic-free kite. You could learn about dragonflies and damselflies, or test your speed and coordination in the Fitlab.
There was 3D printing and fabric upcycling, and there was papermaking and dancing with light.