This word building activity travel kit is perfect for toddlers and preschoolers for road trips and long car rides and you can customize it with sight words, color words, word families, or whatever your child is currently learning. Great for a summer learning activity.
To add a level of difficulty. I would add number cube to see how many letters to cover up at a time. Use tally marks, dots, numerals ect Free "find the letter" alphabet worksheets! Get them for uppercase, lowercase, and both!
Set up a simple fine motor activity to work on letter recognition. This letter matching activity can be set up various ways depending on your child's skill level: alphabetical order, uppercase/ lowercase letter recognition, sequencing, etc!