Hi
There is pony trecking close to corvera village.
Murcia city is a really nice day out for a walk and something to eat on the main square beside the cathederal. Look out for the menu del dia.
Terra natura is in Murcia http://www.terranatura.com/Eng/Inicio/Index.aspx
The mar menor with the warm water is great for kids, try los Alcazares.
Also lods of activities on the Simply networking website.
Regards
Jonathan