Making a Grenade Explode

Ok so In 2 days i'm giving a presentation to a a bunch of teacher who are interesting in using this material in their classrooms, and i've decide to make a simple pong game for them. but i'm using soldiers and a grenade. but i would like the grenade to explode if it hits either left or right screen, can someone give me some help or direction. thanks

That one is easy. Test posision of Grenade and click on the the Left and Right arrow markers.

and then add the condition that if it is leaving left or right edge - create an explosion active at the grenade and then destroy the grenade.

what he said