Additional useful tools
Additional tools that follow are not mandatory but can help you with assembling Nibble
Desoldering vacuum tool (aka. solder sucker)
This tool is useful for cleaning up soldering mistakes but is not 100% necessary for assembling your Nibble.
It should help you with the removal of solder if you make a mistake here or in any other case of soldering later.
Simple solder sucker used for removing excessive solder
Helping third hand with magnification
This one is also not necessary but will make your life (…and soldering) much easier when it comes to assembling and/or repairing devices more complicated than Nibble.
Helping hands can sometimes have multiple accessories on them
It will prove useful for testing some tricky connections and measuring supply voltage.
Besides that, a good multimeter can help you test resistors, transistors, diodes, capacitors, measure the current and do all sorts of other useful things.
When checking if something is working or not, it's best to use one of these
You can use it along with the desoldering vacuum tool to clean up soldering mistakes.
It will clean the excess solder from the places unreachable with a regular desoldering vacuum tool.