The X-Men© set of toys was an over-the-counter purchase which included
four hard plastic interlocking vehicles measuring 7cm:

Magneto™ Wolverine™, Storm™ & Cyclops™.

The vehicles can be attached together either end to end, or side by side.

Each packet included a picture insert of each vehicle. A two-sided mobile measuring 48cm in diameter hung in each store.
One side shows the X-Men Vehicles, the other side shows the Barbie Dolls.