Here are some ideas how to start:1) two teams, match the country to its sport (that �s if your students know them)
2) two teams, give them the names of the tools or flashcards and have them guess the name of the sport that uses those tools; a similar activity could be guessing a sport with a help of a card with a clue (e.g. clue:to do this sport you need goggles and a pool, answer - swimming)
3) make a set of anagrams of the sports they know and have them compete at guessing them
(e.g. imsngmiw, loaftlbo, xob, sinetn, etc.)
... maybe not that fancy but can be enjoyed by students.
As to ending a lesson, why not do it with a song? perhaps something like "we �re the champions" (btw there �s a sponge bob version and a crazy frog version on YouTube:) or "the waving flag"...