This is the link to the Loro Parque pricing page.
http://www.loroparque.com/ingles/fullpage.html €30 for adults €19 for children as non-residents
You haven't said where you will be based, but if you don't have use of a car and need transport then we sell tickets including coach transport to and from Loro Parque for €40 adults and €23 children. I'm sure most places that sell excursions will be similar.
Enjoy the trip its a brilliant day out.