If you send a note home for every child every day you're setting yourself up for a LOT of work, especially if you're only there half a day. Do you mean just how their mood was, toileting, snack, that sort of thing? I've included some links to what I think you're looking for.
If I were you, I would make my own. I didn't do a daily one for preschoolers, but when I taught toddlers, we sent home a note something along the lines of "Today Mary was really busy in the block area. She and Johnny built an airplane. I really loved watching them share the blocks and engage in this play together." Things like that. Just a few sentences. We didn't send every child a note every day, but we wrote about 3-5 notes each day and kept track of who had one and who didn't. If the child did something spectacularly interesting or something, we might send an extra note.
Another option is to have communication notebooks. They keep them in their backpacks. Give them to you each day. You check to see if parents wrote anything to you. Answer if needed. Write a note in some of the notebooks every day, or as many as you have time for. Then the notebook goes back in the backpack and goes home each day.
Another idea for saving paper and time: If you want parents to know what was going on at school each day, how about getting a big dry erase board. Make permanent sections for each area like "Music, Art, Blocks, Dramatic Play": whatever is most important to you. Then each day you can write in "We sang X" or "We did marble painting." Even have a circle time just before going home and ask the kids to tell you what to put. Post the dry erase board where parents can see it.