Type, for instance, "Four" and see that it equals the number of letters (=4).

"SquareRootOfNineHundredSixtyOne" (=31).

Or, "SquareRootOfTwelveHundredAndNintySix" (=36).

"OxygenAtomWeight"(=16).

"EnglishAlphabetHas?Letters"(=26).

"MyAgeIfNineYearsAgoIWasTwenty"(=29).

"ItsHalfIsSix"(=12).

"LastTwoDigitsOfYearWhenWorldWarTwoStarted"(=41).

"TheRunningOutCentury"(=20).

The Activity is best to play in a group, where some bring new ideas from various disciplines, others playfully fix them.

Stimulates LEARNING NEW CONCEPTS - just participate actively.