In 1962, a set of 200 stamps were inserted. Here is the Mickey Mantle stamp.
In 1964 a set of 164 coins were inserted and in 1971, a 153 coin set. Here is a coin from 1964 and one from 1971.
In 1968, a 33 card baseball game set was issued.
In 1969, a set of 48 small decals were issued.
Also in 1969, a 35 card set of deckle edge cards were inserted.
In 1970, A set of comic like story booklets were issued.
In 1970 and 1971, a scratch off game of 24 was inserted.
But my all time favorite insert, which was around for many years and still is in some sets is.....THE GUM!!!!!!!!!!!!!!!!