Our daughters were no exception. They participated in summer activities over the past few summers, which lent structure to their wide-open days. They were not old enough to work fast food or bag groceries, so we chose to include summer learning activities as part of their allowance-related responsibilities. This may not be an option for everyone. You might find that negotiating with privileges in exchange for activities works better.
Teenagers are no exception.
We offered our teenagers many suggestions, and they had a few of their own. Here are the most popular activities we came up with as a starting point for parent-teen discussion. But quite a few just require a library card. Summer gives ample time for any teen to achieve a typing goal. Others who can already type might benefit by increasing performance factors like speed and errors.