Read 20 minutes per day for at least 5 out of 7 days every week
Do at least one act of unbargaining service each day (do something just to be helpful)
Play fair
Learn 5 new species of trees and 5 new species of plants (take pictures of them)
Practice cutting any number under 30 in half (even the odd ones)
Practice doubling any number under 100
Learn all your square numbers up to 12 x 12 (1 x1, 2x2, 3x3, etc.)
Make a new friend
Go to a park you've never been to before
Swim (or just go in as deep as you are ready for)
Apply sunscreen liberally
Help plan and then make dinner for your parents
Drink plenty of water
Draw something you really care about as many times as it takes to get it just right
Bring this to school to hang on the wall
Stay up late one warm night without being in front of a screen
Learn how to do a cartwheel
Measure something growing on a regular basis
Count by threes
Estimate with numbers every time you have the chance
Take a nap in the middle of the day
Create something that makes you happy
Write a story, paint a picture, build a sandcastle. Create often. Be picky, but allow for mistakes. What can you create on your own? What do you need help with? Where can you get help?
Write a letter
Hand-write an actual letter. With a stamp and everything. And then mail it. Grandparents love letters. So do former teachers. How is your handwriting? Is it time to practice? The best time to plant a tree was 20 years ago. The second best time is now.