Just get a black marking texta and write their names on their backs :P

With the ear's though, they are her children so totally up to her if she wants to get he pierced. Both of my girls have their ears done. Tehya was done at 10 weeks and Abbey 12 weeks. Neither have had any problem with them at all. No infection, no issues. I think that getting them done at an older age is when the infections are more likely as they will play with their ears with grubby fingers.

I think it's a great idea for your mum to do.

How are the twins going anyway