Hi Tom,
Thanks for your message,
I would recommend you ski school for your child, because you could choose between three, four and five days lessons. Also, if your partner is taking week lessons maybe it is a good idea to have both of their lessons at the same time.
Just for your information, usually, children under 5 years old in ski school also start the lessons on the snow garden on the first day, as usually they are too young and they don't have the strength enough to be in the mountain for hours. It depends how the instructor sees the progress of the children if he takes the group to the slopes or they stay in the snow garden. Also, in this case the child will be with the same group throught the week. The price for a 5 day Infant Group lesson is 146€ and you can book it
here.
Snow garden is usually used to leave the child a few hours so the children have fun while the parents can enjoy the slopes of Arinsal. However, there is also a package of 5 days Snow Garden and the price is 148.5€. You can find all the information about snow garden
here.
Please, do not hesitate to contact me in case you have any other question,
Kind regards,
Esther