First off, why does this kid want a Tamagotchi? I guess they're making a comeback now, but you have to understand that I already went through the Tamagotchi phase twenty years ago. Yes, twenty years ago. I still have a Yoda Giga Pet (Giga Pet was another brand of virtual pet like Tamagotchi), and it's still complete in its package. I'm not about to buy a brand new one for thirty dollars in this day and age. No, thank you.
What a cute mom. I hope she actually meant it though. It would suck for weeks to pass and this kid to ask, "where's that Tamagotchi you said you were going to Tamagetme?" The parent would look at them with a blank stare and then finally realize, "oh, that. I only said that to make a joke. I had no intention of actually getting you one. Plus, you're adopted."