Hiya,
I used to be a rep in Tenerife and went back last year - i tend to go her quite often.
Loro Parque is fab and will take 45/1hr from Los Gigantes if you are going to go with your tour operator!
I would also recommend Siam Park - its a new water park based 2 mins away from aqualand near torviscas - if you wak right through the park there is a pretend beach which has a huge pool and they have waves on every 1/2 hour!! kids love it!!!
if you need to know anything else just ask and ill try and help.
xx