Why do they make cleaning gel packs look so much like candy?

Why do they make them in such bright, attractive colors, instead of darker, spider-bug-snake colors that a kid would be less likely to sample?

And are there any advantages to using them?

My husband tends to buy into the latest fads, and he brought some home for the washing machine and the dishwasher. I imagine they’re more expensive and you get the same results, plus they need to be kept out of reach (and you just hope no one accidentally drops one and doesn’t notice) so I’m not real happy.

Are they worth it? And why the colors?