I think, Christmas vacation or the summer vacation is an idea time to enroll your child into different activities. There are different types of classes learn different things to the children. You must have to enroll your child in the Christmas vacation or the summer vacation because mat that time schools get vacation and your child is free from the school activities so your child can easily learn the additional activities.
The additional activity involves various things like painting, crafts, music, dancing and calligraphy and many more things. You must have to enroll your child based on the interest of your child.