Terrarium Project Beginning: Help Needed

First, I want to say thanks to everyone for the amount of bottles that were brought in over the last week. We now have enough for all classes to build terrariums. Awesome! We are planning to start our growing process Tuesday afternoon. To be prepared, we do need to do some prep work in advance. We need to cut each bottle (something probably not suitable for our students to do) and also copy growing journals for each student. We will be doing this prep work after school on Monday. Any help from families would be really great. If it works within your schedule, there will be play activities for all ages while we get to work. I can't imagine it will take too long. No need to confirm, but if you have an extra half an hour, it would really be appreciated.