The game or "educational toy" as described on the underside of the box lid was aimed at helping younger children spell 100 words correctly.
Consists of a perforated base board, 20 word cards (each with 5 pictures on) and 80 plastic letter tiles.

If the word is spelt correctly the tiles will easily fit onto the appropriate square; the ‘snap’ of a correctly positioned letter is actually pretty satisfying. A letter in the wrong place will not fit (==> mistake proofing). There are sufficient letter tiles to complete a card. Once a card has been completed the letters are removed and another card selected.
Some letters can be used upside down [n vs u; b vs q; d vs p)

On the base board all letter tiles will fit into any position -
you can form any word up to 8 letters and even short sentences.