That plane has been bugging me ever since I saw it. I really want to add it to our collection soon. We have not added it yet due to the $100 price since it comes with the controll tower. We really do not need a 10th controll tower but that plane looks great. I really like how the front opens to load freight. I still have not figured out the BOGO sales and how, when they work.
Our boys only got really interested in Knights when they were around 8 so perhaps you have some time for it to grow on him. When they were younger they took all the dragons and gold and used it with the modern world stuff. We now only built big castles where they wanted to fit it with properly armed knights, kings, princes, queens and slaves. For what ever reason they really are interested in slaves and who has the most 
Geobra needs a proper medieval peasants and slave add-on set
That is a very cute picture of your son and his new plane 
The plane is awesome. Its built very well, the only problem is that he sometimes puts his weight on the top of it when hes driving it around and the wheels fall off really easily and are hard for him to put back on, so Ive been doing it. Other then that hes been flying it around the house all morning. And that sucker is HUGE! He has to carry it with two hands or under his arm because its almost as big as him! Very sturdy and well built (aside from the wheels) and hes been having a blast. If hes still interested in this set next year, Ill probably get him the airport terminal and 6300 and the cargo 5262 with the little vehicle and the passengers. I think he'd like them.
I also just got together the little speedboat (4862) and of course, kiddo wanted to immediately take a bath with it. With the motor on that thing that little sucker flies in the tub! To bad the tub wasnt bigger haha. I think the big camping set will go nicely with that and the camper van and summer home he has for next year as well.
Im thinking the castle stuff will take awhile. And personally, I like all the more modern sets. If I can find one on Ebay, Id love to get the hospital for him to go with his ambulance. Or maybe the school house. But so far the more modern sets are a much bigger hit. I wish we would have found Playmobil before the construction sets got discontinued. He would have LOVED those, and they are atrociously priced on Ebay now.
BOGO sets at TRU. Buy one get one half off. I dont know when they do it, how often, but I look often enough to where I can usually find them, normally on Holidays. I got lucky to get the summer home and camper van last year on BOGO. And this year got the Police Station ($100), airplane (BOGO $50), the Longneck Dinos ($50) and the boat (BOGO $10). The PS and Airplane I got at Back to School BOGO, the other 2 for Christmas BOGO.
Finally done putting it all together! Now to throw away the boxes and find a place in his room for it all haha.
