Conversation so far:
When was Pet Sounds released?
In late 1965, Wilson began working on material for a new project, Pet Sounds.
What songs were on this project?
Wilson even toyed with the idea by releasing "Caroline, No" as a solo single in March 1966, it reaching number 32 on the Billboard charts.
He toyed with the idea of what?
releasing "Caroline, No" as a solo single in March 1966.

Question: What other singles did he record during this time?
Self-contained rewrite: Besides "Caroline, No", what other singles did Brian Wilson record in March 1966?