I haven't done memory boxes for either DC.
The thought had never crossed my mind until a friend mentioned keeping her DS's first tooth to put in... She seemed genuinely horrified that my children wouldn't have these boxes to look through when older...
I am now thinking I should have kept first babygrow and cord tag etc...
AIBU in not having done them... Im really hoping no one does them as Im feeling a bit of a shoddy parent.