That's a nice looking truck. I'll bet he's chomping at the bit.
I gave it to him in “as arrived” condition so he’s been cleaning dust out of all the nooks and crannies with a Kleenex

It has a vaporizing burner and overflow plug, so it was made between ‘72-‘76, not too bad looking for nearly 50 years old! These really are the best model to give to a little boy because they can have nearly as much fun driving them around and loading the box without steaming them.