So, my eldest started Reception in September 2019. Since, she's brought home various stickers (due to her hard work, obviously). We've been looking for somewhere to keep them.
Here's what we've done:
Going forward, I have purchased a 2020 calendar and put it in my daughter's room. If she comes home with a sticker, we'll add it to that date on the calendar. Come 2021, we can reflect on her year... Hopefully, a calendar full of stickers!