Go for a walk and look for letters of the alphabet all around you!
For example, if you go on a walk and spot a squirrel, you can fill out the Letter S Activity.
(If you want to make this a little more difficult, you could also try looking for the shape of the letter in nature. An S might be a snake moving on the ground, or a blade of grass in the water.)
This is not for a prize, it is an activity to share with your preschooler (or family) over the summer.