I usually have the opposite problem - the students work quickly to finish a project, and then I have to have osmething else for them to do. One recurring problem is with in0class activities: there is also at least one swift student who finishes quickly and then needs something else to do while we wait for the slower ones to finish. I would be interested to hear how other teachers handle this. You can't just keep assigning more work for the faster few. It wouldn't be fair to make them do more worksheets, for example, than everybody else.
