My first suggestion would be an associate membership with the Stage Manager's Association: http://www.stagemanagers.org/
I'm the co-Secretary for the SMA, and if you do decide to go for a gift membership, I highly suggest you wrap up a note saying you'll do it, but don't try to purchase one online until after January 1st. The credit card system is not set up yet for 2007 memberships (it would only give you a pro-rated version of the last few days of 2006). Or you could send in a check or money order for 2007, and we'd process it after the first of the year.
The other ideas are great too. Perhaps her own set of easy-to-read measuring tapes. 25' foot "straight" ones, and 50' or 100' cloth/vinyl rolled up ones. There are several out there hard to read....take a look at them before you buy them blindly. See if the number for each inch is right by the hash mark, etc.
My dad's always into giving me more flashlights...
Erin