Family sharing of in app purchases is enabled for Jigsaw Box. This allows you to share packs you purchase with up to five family members. First of all you need to set up your family group.
Family Sharing can be set up on your iPad in iPad Settings, tap on the first entry in settings - your Apple ID and then tap on Set Up Family Sharing.
On the Get Started screen - tap on iTunes & App Store Purchases and Continue
Tap Continue on the Confirm Account and Shared Payment screens.
Tap on Invite Family Members.
You can invite members via iMessage - they will need to be already saved as a contact on your iPad for this. Or you can Invite them in Person.
Inviting a family member in person means that they have to enter their Apple ID information directly into the screen below when it appears on your iPad.
Recipients of the invitations need to accept them by tapping Join Family in the invitation message.
Once you have set up Family Sharing, any packs you have purchased in Jigsaw Box will automatically download to the library of your Family Members and future packs you purchase will also automatically appear in their library.