In the Centro Internacional de Ferias y Congresos de Tenerife in santa cruz ( concerte centre opposite the auditorium) at the momnet there is an indoor fair/ amusmement park
Is is aimed at children of all ages and is 6.50€ to get in and all attractions are then free inside and you can saty all day.
There are train rides, mechanical ponies, bikes, bouncy castles, ball parks, recylcing projects and much more for the younger ones.
For the older kids there are fairground rides and a rock climbing wall adn rops slide.
check out the website for the opening times
http://www.iftsa.com/pit/index2.html you just need to click on ver horairos
It runs until the 7 th jan and is open straight through.
Great fun we were there for 5 hours and had to drag the kids away