A perfect literal translation:
万 "ten thousand" +
花 "flowers" +
筒 "tube" → "ten-thousand-flower tube," capturing exactly what you see when you peer in. Frequently used metaphorically (
像万花筒一样) for anything dazzlingly varied — city life, a busy market, a colorful film. Naruto fans: the Sharingan eye technique "Mangekyō"
万花筒写轮眼 borrows the same word.
