Do you need to consolidate Present Perfect and Past Simple tenses? Here's an engaging PowerPoint Grammar competition on both tenses.
The activity covers the basics of both tenses in comparison to each other. The questions are relatively simple, but some questions have a twist. The main grammar point is definite and indefinite past. Students should know that completed actions that have no relation to present need to be in Past Simple tense and activities that are finished but have relevance to present have to be in Present Perfect. Various time expressions used with both tenses are also covered. It's also important to note that the use of both tenses in this PowerPoint is more appropriate to UK English.
If you need a print-out version, you can have a look at the consolidation worksheet version. It has a different set of questions.