Give it a table: one row per thing, a name column, and a few columns with numbers, categories or a description. Aspected indexes it and every row becomes a mystery to guess, with a tile per column. Products, wines, servers, colleagues' favourite films: anything with a table.
Up to 300 rows and 250 KB. The table is stored on this server and anyone with the link can play it, so do not upload anything confidential.