Everything is theoretically possible, that’s one of the beauty’s of studying physics in an practically infinite universe. With enough time, everything isn’t just possible, but everything will happen. There’s a reason scientists don’t deal in possibilities, but probabilities.
But that isn’t really something suitable for a 5yo
Particle accelerators use powerful electro magnets to speed up and control particles. Particles are quite literally everywhere, and electro magnets aren’t rare either. You could build a functional model with some dedication and YouTube tutorials.
Building one that’s actually capable of influencing specific particle beams is a different matter, and would take years (if not decades) of hard work and relentless study. Using that to create a black hole would be even more difficult, and obviously a terrible idea.
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