There are four levels of ignorance [1]:
It’s very important to have ways of bumping into Unknown Unknowns. A friend tells you about X. A chance meeting. You read a strange book. You notice you’ve been failing and don’t know why. Going for a walk. Attending University. New experiences.
Once strategy is serious play. Messing around with something seemingly unrelated. Following your interest and sense of fun where it leads even if it’s silly. Don’t let your societal schooling interfere with your weirdness education.
Play lets you explore your boundaries, you’re more comfortable failing so your reach extends. When you're in this mind-frame you notice the wobble of spinning plates in the cafeteria or leave photographic plates near your radium samples or think it strange that mold grew on your infected samples.
Reality is far stranger that it appears. You’re probably wrong about something and there are might crucial considerations that you’re woefully neglecting. But you can’t know which until after the fact. There’s always more to learn, go bump into the world.
Great experiments can be accidents, play will make you accident prone. Play is a biased random walk.
In that spirit, experiments:
say "rhubarb" over and over again untill it sounds like weird noises, look at the world upside down, open a “forbidden” door, write as many questions as you can about one particular tree.
Notes
[1] These are four levels that I know of. Might be more. who knows.
Armour, P. (2000). The five orders of ignorance. Communications of the ACM, 43(10), pp.17-20.
Title is inspired by more Feynman, spinning plates & serious play