2. Should I print all the sheets at once or can I print a few first and the remaining later?

You can first try the making the DIY kit by printing just the first two sheets – Sheet 1 and Sheet 2. You can then download the App and create a sample activity using the 10 free scans that comes with every download. If you like to make the full version of the DIY kit, you can print the remaining sheets. To increase the number of scans within your app, you can purchase more scans via In-app purchases.