This activity can be customized to the skill level of the learners:

General Skill Level Modifications
"Advanced" Three bulbs The learner can fill in the blanks without the aid of a word list. Passages can be longer, and can have more blank spaces, which can appear more often.
"Intermediate" Two bulbs The learner can fill in the blanks with the help of a word list. Passages can be shorter, with fewer blank spaces. The passage may need to be read aloud while the learner follows along.
"Beginning" One bulb This exercise can be done orally to make it easier for the non-reader. Short passages with very few blanks and a word list can be used. Alternatively, a choice of two different words could appear after each blank.

Some Ideas: