Some of the Iris carts (especially the Lego primary colored ones from Target) have slots in the frame, and tabs are cast into the back of the frame. You snap these tabs out of the frame, and lock 2 stacks together through the slots. The Iris carts I (...) (22 years ago, 8-Aug-02, to lugnet.storage)
(...) Ok, I guess I need to give them a call. My older Iris carts don't have slots or tabs. The new ones have slots but no tabs. Frank (22 years ago, 10-Aug-02, to lugnet.storage)
