scaronthesky:
I came up with the following breadboard. Could you please tell me whether this is correct?
Not without a proper circuit diagram. So far it's been Fritzies and spaghetti that I've seen from you so sorry, no go. That's too impossible to figure out. Even a rough hand-drawn circuit diagram is better, or if you want to be more serious in this hobby get a proper circuit diagram program such as KiCAD or EagleCAD.
Some obvious errors in that spaghetti image:
- The power source has both + and - connected to GND. That's going to smoke.
- Same for the Neopixel and SD card adapter: Vcc and GND connected. But it won't get powered anyway so at least no smoke from that.
- C1 has only one pin connected.
- GND is connected to A7.
- one of the pots is connected to the RESET.
I stopped looking. This is enough to declare it an unfixable mess.
And to take the question a bit more literal: a protoboard is not suitable for anything that has to resemble permanency. If you build your toy gift with a protoboard it'll have fallen apart before you're done packing.