The Cajon box drum is very easy to assemble. You don't even need clamps - just tape and glue! The decorating possiblities are endless - paint, woodburn, stain, stickers, decals, etc. This is a great project to work on with kids. They'll love decorating and then tapping out some fun rhythms.
I am very pleased with my kit so far. I bought the cajon kit as a Christmas present for my son, so we have not built it yet. Placing my order was easy and my order was filled quickly and accurately. I opened the box to check the parts and they were securely packed and seem to be made well. I am resisting the urge to build it and give it to him assembled.
I was a bit surprised by your attention to customer satisfaction. It is unusual to see that interest from a vendor, either on-line or face-to-face.