There are several good reasons not to go nuts on nuts (I minimize them actually). Small doses of phytate won't hurt anyone but it's still a lot of calories and omega-6 that can displace other foods.
Almond flour is popular among low-carb folks but kids don't need to worry about that. Pancakes don't need to rise so almost any starchy plant will work--cassava, plantains, chestnuts, etc. You can either use the flour or boil and mash a fresh one. If I want fat I'll top them with butter, creamed coconut, or grated baking chocolate.
Lots of: urban hiking, cycling, sprinting
Lots of: fresh meat, seafood, eggs, organs, tubers, starchy fruits, low-energy plants, meat fat, dairy fat, oily fruits
Some: cured meat, dairy protein, sweet fruits, rice, peas, tree nuts, oily seeds
Minimal: soy, refined proteins, sugar, liquid carbohydrate, grains, beans, refined oils, peanuts