Fun with words formed from a single word

There is a language game that my students like to play. It is forming words from a long word given. For example, if I give them a word such as 'dictionaries', they can come up with the following words:
act, action,dot,cite, tin, on, at, is, eat, ate, diction, ado, tie, ran, rise, arise, rose, sea, sit, sat, disc, date, rate, rote, doe, cries, dries, die, it, its.

I time them for the speed of forming 30 words such as the above.

Who says language study is no fun?