I have a number of KiwiCo boxes for sale. They are all new, not used.
Some may be opened, but all boxes are complete.
There is a variety of crafts and stem boxes. Age groups differ, but some start at 9y.o. If box marked 14+, then it probably requires a bit more attention to detail and can be challenging to someone younger.
For full descriptions search "name of the product KiwiCo". I do not include links, since KiwiCo redevelops the site from time to time.
One box is $25, two - $45, three - $65. If the item is still listed here - it is available.
Tinker and Eureka are engineering series. Doodle and Maker - art & crafts.
Tinker (9+)
Sketch Machine
Aerophone
Magnetic Light-up Pendulum
Doodle (9+)
Desktop Corkboard
Eureka (14+)
Wooden Ukulele
Mechanical Globe
Maker (14+)
Paper Mache Pinatas
Gilded Journals
Engraved Accent Mirror
Needle-Felted Electronics Case
Geometric Tiled Tray
Marbled Paper Designs