Hi, we have been many times, both on our own now, but with the children since they were 3 or 4 upwards. We always stay in Puerto de la Cruz. Less lively that the south, but plenty to do for all the family. A good beach, with life guards, although the sea may be too cold and too rough in October, remember the sand is black. There is also a very good sea water Lido. The sun will be hot, and you will burn so take care. Take a trip to the Parrot Park, free mini train for the centre of town. The local buses are a good way of getting around, and with a BONO card fares will be half price. There are plenty of shops and bars restaurents etc, all are child friendly. We love it, I am sure you will too. Enjoy.