Walmart offers the Feelings In a Jar Cards for $3.65. (Amazon has it for the same with free shipping for Prime members.) Opt for in-store pickup to avoid the $5.99 shipping charge. That's $6 off list and the best price we could find. It features 365 slips with feelings written on them, which can be used for games, topical discussion, or whatever you like.

Update: In-store pickup is no longer available. Amazon still offers it for $3.65 with free shipping for Prime members.