Heh... introducing younger siblings to new vices, excellent.
Hmmm... I need some little nails. I bet there are some in the garage. And I need a stepladder so I can reorganize the cabinets. I hate being short sometimes.
Check the hardware drawer and also the big cream colored bowl on the counter for little nails. Just be warned that the walls themselves, being plaster, will repel all such nails.