A game that worked really well in my class: you need some flashcards with things like 'soccer, grandfather, TV, Jeju-do etc' so you can make logical past-tense sentences with the key expressions, eg, I visited.... I played... I went ...
the kids are split into four teams and one student per team must act out the card or describe it in English without saying the word. The team gets 2 points for guessing what is on the card, and an additional 3 for making a successful sentence in the past-tense. You can make it a bit more fun by using a timer. My kids are low - moderate ability, so I had a PPT slide of the possible 'I visited...' 'I watched...' etc. just to help them along a little.
A nice change from PPT-based activities!