Imagined you were making sure he wasn't hungry, but thought I'd ask just in case It was a mistake I made! I'm no expert as have only been doing BLW for a couple of months with my 8 month old dd, but from all I've read and heard from other mums, it's v common for babies to take quite a while to "get" solids and actually start eating, or even bring food to their mouths. And like you say, they all develop differently, sounds like you're right about bringing toys to his mouth.
I'm sure you've read this before but as long as he's getting enough milk he'll be fine, and he will get it in the end. In the early weeks, no matter how many times I read this, I still needed to read it again and again I've read and heard quite a few times about babies getting upset and not bringing the food to their mouths for quite a few weeks at the start, so be reassured it's common.
Are you sitting him down with food 3 times a day? Maybe you could take the pressure off you both and reduce it to once a day if you're doing this, or take a break completely for a few days. You could also make his "meals" shorter too. My lo got bored very quickly at the start, and she wasn't in the mood sometimes at all, especially if more tired than usual/teething/about to get a cold...
Plus, another mistake I made at the beginning, before I chilled out, was staring anxiously at her!! Not much fun for her, lol! You sound much more relaxed than I was, but just in case, remember to ignore him and relax, and eat your food.
BTW what does he normally do with really easy to grip stuff like rice cakes?