My daughter was given this kit for her 3rd birthday and we've just made the first (and simplest) item in the kit - a notepad holder. She really enjoyed it and though I needed to tie the knots for her and give plenty of direction, she was able to do a lot of it herself. I'm very pleased with the kit and my daughter is keen to move onto make the next item (a pencil case) later today. So although it's aimed at 5 years+, younger children can use it too and I'd imagine that an older child could make the items with minimal guidance.
In terms of how the kit is put together, the parts of the kit for each individual item (there are 5 things to make - notepad holder, pencil case, picture frame, butterfly bag, neck purse) are bagged seperately, with a couple of needles in each set so you don't need to worry if you lose any along the way. All the foam pieces are pre-cut and the instructions are pictures rather than text.
I'll be buying this as a gift for other children in the future.