There are two companies that I know of that clean bbq’s, you will need to contact them with the type of bbq you have. Read more
There are several places that take volunteers, at Expat Echo Dubai we have compiled a list of places that accept volunteers, take a look here, however, you will need to contact them directly. Kids Summer camps are also on, they may require extra help, you can take a look at our Summer Camp Directory which has all the contact numbers.
If you take a look at our comprehensive list of Summer camps here you will find contact information for each one. You can contact them directly and ask if they need any help with their summer camps.