We gave this to our grandsons, ages 7 and 3 and they were thrilled.  We can see that it will be fun for them and their friends for a long time.  The product is made well, but was somewhat frustrating for my husband and son-in-law to assemble it.  My husband, who is very skillful at assembling anything from cars to airplanes fortunately had washers in his tool kit to place between the bolts and plastic and indicated that the bolts would have worked much better if they were about a quarter of an inch longer.  I am considering purchasing another one for my other grandson based on the finished product and fun, but I would hope that this feedback will perhaps help Step 2 and any buyers to realize that this would be something that would greatly help with the assembly.