So work-jobs is exactly right and learning centers are not.

All the learning center and other activities stuff I checked out require constant teacher attention... they're not things that can be kept on the shelf to encourage use of free "station" time and differentiated activities.

Problem: Is there anything published after say, 1990, that doesn't have scary dangerous things like sharp nails and creepy blindfolds (eg decorated bags over the child's head)?

There's a ton of wonderful stuff in this book from the 1970s but I worry that it will be off-putting.

Side question: Is it that the educational establishment hasn't encouraged kids to work on their own for 30-odd years, or is there a new vocabulary word I'm missing that isn't learning centers that covers this idea? Amazon doesn't seem to think so...