What you need!
1. A toy grenade
2. Fake cherry
3. Silicone faux whipped cream clay glue decoded, you can find that on eBay.
Get your grenade and pick the right shape to use the whipped clay, I picked strawberry. Then go around the grenade until your half way on it then put the cherry on top make sure to put some whipped clay around the cherry to make sure it will stay.
Then leave it to dry for a day or two but make sure to leave it in a cool place, maybe the fridge. Don't touch it until dry!