best way to purchase Child 7 day PH?

[dreamalittledream]

I need a 7 day PH for my 4 yr old DN. they have a package with 1 day base passes and have 2 adult 7 day PH from before. Which is the best option for getting the child's pass?
1. upgrading the 1 day to a 10 day, non exp and saving the 3 extra days for future?
2. upgrading the 1 day to a 7day, w/o exp?
3. buying a 7 day w/o exp from an outside source and saving the 1 day for later so they are all even for next trip?

thanks for your help!

 

[dreamalittledream]

any ideas???