Looking for rough sketches/ideas for a sibling tattoo

I really want a matching tattoo with my older brother, but I can't really think of a design he'd like that would tie into our childhood but also look good. I'm kinda thinking smaller, like 3-5" maybe? Here's some stuff between us that might help:

HE loves hiking (I don't), the mountains, and nature. Though he already does have a tattoo relating to that

He also loves hunting! Big game like elk, antelope & deer, not rabbits, birds or smaller game. Though this is entirely his hobby as I never enjoyed the sport nor have ever joined him on it. 

He also really enjoys legos, & though he's still super into it now & I'm not, but we used to build legos together in his room. We 

I really love wildlife & animals -- & I mean all animals! Domesticated, exotic, reptiles, bugs, cattle --- literally anything. Though, my favorite animals are birds, specifically blue & gold macaws. I also really like spongebob, dinosaurs 

We used to play Wii a lot together 

We used to go on bike rides a lot together

He's my older brother & I've always loved him so much growing up. He didn't quite see me the same way until he was older, & we used to fight all the time. But all I wanted to be was around him all the time & do what he was doing & hangout with him & his friends & stuff like that. Now that we are a lot older our bond & relationship is absolutely amazing, especially since we both kinda disowned our oldest sister & our youngest brother was adopted in 2016 & is nonverbal autistic. So it kinda feels like him & me against the world now. Like we had our whole lives with each other. 

I don't know how much of this is just me reminiscing & how much are concepts you can actually work with. I'm totally open to any (semi) original art pieces, I’d love to just see any super rough sketches of older brother – younger sister tattoos. I’m hoping to get this tattoo for my 21st birthday around July 12, since I got the one for my little brother (an autism puzzle piece) for my 16th.