Please comment on this Ertl collection

Thanks to everyone for your responses. I am thinking they are doing no harm at the bottom of my parts box for now will keep them and am clearing bulkier items such as my big loaders and beige track. I hope to read the full railway series eventually and some characters may mean more to me in future.

Chrisjo I appreciate the link. After reading up on Bandai I was also able to identify these other models as 'Ki No Thomas'. They looked to me as poor versions of wooden railway but are actually 3d puzzles: