I love to pack things like these to my kid’s lunch box. They are full of healthy ingredients and right calories. It is a bit of pain to find something similar in stores. There are plenty of energy bars, but nut-free ones are rare. So, I make them myself. It almost doesn’t take any time at all. Fruits, seeds, and cereal can be varied to suit any personal taste or budget. If the nut allergy is luckily not your problem, the bars can be made with any nut butter you prefer.
There’s one thing I want to point out. If you are making the bars for a nut allergy sufferer, make sure to read the ingredient list on a sunflower butter jar carefully. There are a few manufacturers who make this particular kind of butter in nut-free facilities. The most common brand, as I notice, makes all kinds of nut/seed butter together at one place, and probably uses the same mill for grinding.