Conversation so far:
what were james may's toy stories?
Beginning in October 2009, May presented a 6-part TV series showing favourite toys of the past era and whether they can be applied in the modern day.
what were some of these toys?
The toys featured were Airfix, Plasticine, Meccano, Scalextric, Lego and Hornby.

Question: what was his greatest accomplishment?
Self-contained rewrite: what was James May's greatest accomplishment?