A (three-year) Q journal for your kid. I love the idea of sitting down to "interview" your kiddo every day. It's important to give them moments when they feel like the most important person in the room! Also, what a great way to remember the weird shit they say.
Starting in Kindergarten, put the child's graduation year on a large tshirt. Take a picture each year with same shirt to watch the child grow into the shirt. Display at graduation party!
Talking about school with the kids is sometimes like teeth pulling! Some tips and questions to ask your kids after a day at school to get an answer more than "I dunno".