Teach Key Reading and Spelling

1967 3M TEACH KEY Reading and Spelling. Scarce 3M EduPLAYtional game. Triangular shaped box. This game is in the same series as Egghead and Chicken. Includes 2 packs of 24 key cards (48 total), the house board, box, and set of keys. I do not know if add-on card sets were available, although it is possible. Players ages 5-8 insert the key into the correct missing letter hole of each word in order to correctly spell and thus unlock the word.