Primero aquí tienes una lista que nos puede ayudar para ir haciendo las diferentes actividades
https://www.esl-lounge.com/reference/grammar-reference-most-common-irregular-verb-list.php
Spelling activities
https://www.eslgamesplus.com/irregular-past-tense-verbs-spelling-activity-online/
https://www.eslgamesplus.com/irregular-past-simple-spelling-activity-online-for-esl/
Grammar practice
https://www.gamestolearnenglish.com/past-tense-game/
Little game
https://www.cbc.ca/kids/games/play/alien-bridge
More practice
https://wordwall.net/es/resource/37611582/ingl%c3%a9s/simple-past-verbs
Last one
https://wordwall.net/es/resource/17620924/simple-past-irregular-verbs