prevent dirt: to prevent dirt and grit getting in the bearing store it in the tin provided or another clean pouch. i really love this series and highly recommend it. service: which type of service is costing most? lots of kids love making pictures for other people - and the person who gets it will be very happy too. please check with the school for the cost of a school meal. delivery time was a bit long, but overall we are satisfied. however, to be successful in this field, you have to know certain things. staying fit is my main goal now. 