The assembly wasn’t hard to do. We got it set up at pushed the button to start the foam and nothing happened. I looked at other reviews and saw many others had the same issue. You had to press the button just right to start and stop it. Once we got it working it was great. I attempted to start it the next day and it wouldn’t start. Opened the battery compartment to find it had water in it. This machine takes two D batteries and I was very disappointed that we only got one use out of it. The bubble blower portion on top still works but the foam portion does not. 
Very disappointed