So just posted on the bargain thread but probably better here. My newly 5yo Ds is Lego and Ninjago mad. He asked for a Kai motorbike so I bought him the 4+ model (it's about £9). He's now seen the 8+ super charger 71737 which shoots out the motorbike and wants father Christmas to bring it. He's adamant father Christmas knows he's a 'master builder' and he could manage it. It's another £32 on offer which I can do (😣) but I don't want it to be too much for him to manage, on the other hand I don't want him to be disappointed..what do I do?