I didn't like that the booster set with the same name as the original set wasn't compatible. The first set I bought was called the JOYIN Marble Run Premium Set (196 pcs. This set is called the JOYIN Marble Run Premium Booster Toy Set (50 pcs) which is an extra set. Of course I assumed they matched. Now I've got it disappointed boy who didn't get the only thing he asked for.
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