I signed Brooke up for one of Lowe's Build and Grow workshops and we had SO much fun! I believe she is a little on the young side according to their recommendations (4 or 5 minimum age), but they didn't card her and she did GREAT! I was impressed with her hammering skills! I did help her quite a bit, but she did a lot on her own and she was SO SO proud of herself! You can't beat that! She is so looking forward to going again and I can't wait for her to go back! Home Depot does something similar, but we haven't gone yet. If it's anything like the Lowe's workshop, you should definitely check it out!
You sign up online and then go check in where they have you sign a waiver and give you a pre-packaged item to build. Then you go to your "seat" (upside down bucket) and "table" (2"x10"'s on top of upside down buckets) where they have a little hammer for you to use.
The packages come with easy to follow pictorial directions.