52 ideas to get started app smashing--activities for all grade levels pre made, with instructions for teachers and students to get started with app smashing at any grade level. https://app.seesaw.me/activities/collection/m9jyj1/app-smash-with-seesaw

This activity has you smash a few apps together on a Thinglink to share ideas, content, products etc. You complete the challenge and then add the created Thinglink to a google form to be shared with a teacher community. It would be a great anticipatory activity for a teacher PD: http://thinglinkblog.com/2014/11/08/take-the-thinglink-app-smash-challenge/