Probably a playstation game or xbox its not a toy but thats what most teen boys want!
A coputer console
A toy car, transforma robot and pj's
Toy tractors which are best for a five year old boy will vary depending on the boy. A large remote control one will work for some boys, while others prefer the old fashioned type that they can just push across the floor and make tractor noises.
sports equipment
A radio controlled car or truck toy.
legos or transformers or a toy truck
in a toy shop
You could take him to a toy store and buy him a toy to his liking? He isn't old enough to get money yet or handle it.
maybe something like one of his favorite animals, a toy car
a toy phone
A walkie-talkie set would be a fun gift for a ten year old boy. A baseball and bat would also be a good outdoor toy.
Many churches have toy drives. look to them, or a charity, for some help.