This sounds like a typo. I have been baking for 35 years and have never heard of a square nut and I could not find any reference to it in any of my ingredient guides. I would recommend using pecans. Pecans go great in avocado bread.
You have to be at least 18 years old to buy nuts but if under that age and want to buy nuts then ask your mum but if shes not there then don't bother.
You can buy it on iTunes.
They are not always square. Many are hexagonal.
Wrong you can buy nuts at the age of 12 but get it from small shops of corner shops.
You would buy kola nuts in San Diego on... 56 North Gate R.D. The y have the best kola nuts!!!!!!!
Cashew "nuts" are not true nuts. They have no shell.
You can buy stuff.
buy new lug nuts
Gourmet nuts can be purchased at a number of places. One can purchase them at the Nuts website or one can buy them at the Oh Nuts site or at the Gourmet Nut.
Most likely you can buy them where you buy beer; liquor store or grocery store.
Macadamia
Nuts