You're in the backpack aisle. School starts in eleven days. Your 8-year-old picks up two backpacks. They look almost identical.
"Mom, why is this one $20 and this one $60? They look the same."
She is, technically, correct. They both have straps, a main pocket, and a small front pocket. They are both blue. They both feature what appears to be the same shade of teal accent stitching.
This question is one of the best ones your kid will ask you all year. The way you answer it shapes whether they grow up into someone who can tell quality from marketing, or someone who either always buys the cheap thing on principle or always buys the expensive thing assuming it's better. Both of those adults exist. Neither is fun to grocery shop with.
What's really in the price difference
There are basically four things that make one nearly-identical item cost more than another. Knowing these is the entire framework you'll be teaching your kid for the next ten years.
1. Materials. Sometimes the more expensive thing is actually made of better stuff. Thicker fabric, real metal hardware instead of plastic, stitching that won't unravel. This is real and measurable. If you press a $60 backpack's strap and it feels different from a $20 backpack's strap, that difference is in the price.
2. How long it'll last. Related, but worth its own slot. A $20 backpack might last one school year. A $60 backpack might last four. The "cost per year" math can flip the whole comparison. This is a thing your kid can actually understand by age 7 if you show them.
3. Brand and marketing. Some of the price is what the company spent making you want this thing. Ads. Influencers. The little logo on the front pocket. None of that makes the backpack better. It just makes it more expensive. This is also real, and worth naming honestly.
4. Where and how it was made. Some products cost more because the people who made them were paid more, or because the materials were sourced in particular ways. This isn't always true of higher-priced things, and isn't always knowable. But sometimes it's part of the difference.
That's it. Four reasons. You don't have to teach all of them at once. You just have to know they exist so your answer to your kid's question doesn't accidentally simplify into "the expensive one is better" or "the cheap one is always the smart choice."
The honest answer
When your kid asks, try something like this:
"Good question. Sometimes a more expensive one is made better — thicker straps, stronger fabric — so it lasts longer. Sometimes a more expensive one just has a logo people want. We have to look at it and figure out which kind of difference this is."
Then look at it. Out loud. With them.
"Let's see — the straps on this $60 one feel thicker. The zipper on the $20 one feels a bit flimsy. So at least some of the price difference here is real."
Now you've shown them not just what the answer is, but how you decide. The next time, they'll start to do that comparison themselves.
The cost-per-year trick
If your kid is 7 or older, introduce this:
"This backpack costs $60 but might last four years. That's $15 per year. This one is $20 but might last one year. That's $20 per year. So even though the cheaper one costs less today, it's actually a tiny bit more expensive over time."
Their face will do a thing. They will, possibly for the first time, glimpse the idea that cheap isn't always cheap. This is a piece of adult financial reasoning that some adults never quite internalize. Plant it now.
(Important caveat: this math doesn't always work. Sometimes the $20 thing is fine and lasts just as long. Sometimes the $60 thing breaks the same week. You're not teaching that expensive = better. You're teaching that expected lifespan matters, which is a different thing.)
The marketing conversation
For older kids — 9 and up — there's a related conversation worth having when the time is right.
"Some of what makes that one cost more is the brand. The company spent money on commercials and people on Instagram to make you want their backpack. That doesn't make the backpack better. It just makes it more expensive. Sometimes the brand is also actually higher quality, and sometimes it just spends more on advertising. Both happen."
This is, in slightly more sophisticated form, media literacy. Your 10-year-old is being marketed to every minute they spend on YouTube. Helping them see how that works in something tangible (a backpack at a store) gives them a frame they can apply to the invisible stuff later (an influencer pushing a skincare line on TikTok).
What you're really teaching
The "why is that one more expensive?" question is the door. Behind the door is a whole house of skills: noticing materials, comparing quality, doing simple cost-over-time math, distinguishing brand from substance, deciding what you actually value.
Your kid doesn't need to master all of that at 8. They just need to start the comparison out loud, with you, in the school-supplies aisle. The mastery comes later, almost on its own, once the habit of noticing is there.
That's the whole job. Notice with them. Compare out loud. Let them watch you decide.
Now go pick a backpack. Probably the $20 one, in this aisle. But you'd never know unless you'd asked.