Hi there.
I live and work in tenerife as a childcarer and i recommend the anthellia to all of my clients as i think it is a fantastic hotel for both children and adults.
I was working there just 2 weeks ago over the christmas break and the children whom i was looking after had a whale of a time.
You are right on a lovely beach with lots to do with little ones.
You have crazy golf, soft play, trampolines, inflatables in the ocean, family bike hire etc.
There are many bars and restaurants too but not at all loud and roudy, they are very plesant.
The hotel itself is just wonderful with a large heated pool (other pools but are not heated) a couple of nice restaurants ... the evening buffet is amazing with themed nights each day.
Kids club is fantastic, with bouncy castle that sometimes comes out and always doing art and crafty things.
The club also has a large outdoor area with a sand pit and climbing frame etc plus a little green where you can play football.
I could go on haha ...
if you need anymore info about this or any other hotel just ask and i will do my best to try and answer your questions.
Also, it would be aprox 50/60 minute transfer from the North airport.
I hope this helps.
Lisa.