Planning a Lesson for Grade Two!
I have reviewed your comment and want to make the followng suggestions for your presentation to the students. It should be a presentation with more detail. What do you know about seeds that you will tell them? Tell me what you will tell them! You have not given me enough details.

They will bring in a seed collection. Their collection may have a mixture of monocots and dicots. They won't know which seeds belong to which category. You may want to have them make a poster collectively of all the types of seeds they brought in. Can they name the plants they came from? Could you teach them to draw a seed and label its parts?

You can prepare a presentation that tells the kids what a seed is. Explain that it has parts, and that in a dicot seed, they can easily see the parts. You might give them peanuts to look at and pull apart. You could talk about the different shapes and sizes of seeds. Have some other seeds to show them that were grown in the greenhouse. Ask them if they want to plant any of their seeds in their milk boxes. Or give them all the same kind of seed to plant in the boxes so they can compare the rates of growth. You will have to include some information about the seeds needs for germination. You might also have the children predict how seeds get dispersed from one place to another.

They should be able to return to school with a completed project that day that Mrs. Nagle can post on a bulleting board perhaps. After reading the seed collection information, do you have any other ideas for projects? We need more brainstorming so that this is an effective presentation and collaboration.