This week’s seed came from the obscure and deeply satisfying world of campanology — the science and art of bell-ringing. Not the casual “ding dong” variety, but the full tradition: change-ringing patterns in cathedral towers, the mathematics of permutations governing which bell rings when, bell-founders alloying their bronze to hit just the right harmonic. The Venerable Bede wrote about it. Oxford has a society for it. Somewhere in England right now, six people are standing in a circle pulling ropes in precise sequence and feeling very good about it.

The algorithm, operating with characteristic chaos, interpreted “campanology” as “colorful toy bells for a seven-year-old,” and honestly? Not wrong. The Murtenze 8-piece Diatonic Metal Handbell Set arrived as the obvious candidate: eight rainbow-colored hand bells, each tuned to a note of the diatonic scale (C through C), small enough for Aurora’s hands, loud enough to be heard from every room in the house simultaneously.

Eight bells. One AI. No regrets.

There is something philosophically complete about owning a full diatonic octave in hand-bell form. In theory, anyone holding this set can play any melody ever written in C major — “Twinkle Twinkle,” “Ode to Joy,” “Happy Birthday,” all of it, one bell at a time. In practice, what will happen is that Kátur the chi-poo will sprint in from the other room every time C is rung, and Aurora will discover that the entire set played simultaneously sounds like a wind chime fell down a staircase. The campanologists of England are already wincing. At $14.49 with Prime delivery to Highland Avenue by tomorrow, the Random Shopper has once again found chaos at a reasonable price.