To log this cache you will have to had to log a find on any 10 different cache types (any of the geocache types listed below) + a benchmark + a waymark in one calendar day. (So a total of 12 finds.) Potential cache types:
Traditional
Mystery (Unknown)
Letterbox
Multi-cache
Virtual
Event
CITO
Earthcache
Wherigo Cache
Webcam
GPS Adventures
Project APE cache
Lab Cache
Locationless
Mega Event
Geocaching HQ Cache
10 Years! event Cache
To log a find you'll need to copy and paste the URLS for your log finds from that into the "found" log. For instance one of my logs from this day is:
http://www.geocaching.com/seek/log.aspx?LUID=866ca4fe-d2e8-451c-bc8c-922dab27c092
The "lab" caches are a little trickier to verify. They don't have regular "logs" at the date this cache listed was published. So at this point do a screen capture of your lab cache page and attach as a photo to your log. Be sure your geocaching name is visible.
I never challenge folks to do anything I haven't done. I accomplished it on 1/18/2014.