This is a nice idea, OP, but for parents who are new to immersion, the starting points should be their child's school and groups like
http://dcimmersion.org/
There's no need to reinvent the wheel or to shoehorn ideas and products that might run contrary to the teaching model your child sees everyday. If the school's leadership and the family community don't have resources to share, there's not much you can do on your own to compensate.
Take it from a tri-lingual parent who has BTDT in three different immersion schools with two kids and lots of tutoring, activities, books, TV, travel, etc. There's really no need for parents to debate the use of zumo vs jugo.